"Frozen" gelatin ice castle cake recipe (2024)


by Melissa

Sweet One requested a "Frozen"-theme birthday party. i always aim to do something a little special in the cake department. but how to fit this theme? we went to a fun "Frozen" Princess Tea at her Gramie's church, where they served cupcakes with crystal-blue frosting and sparkly sprinkle toppings. i thought about doing the same, maybe displaying them on an ice castle (my friends joked they expected to see me outside with a chainsaw hacking up a giant block of ice... if i wasn't so prone to cutting myself with a friggin' paring knife, they may not have been so far off). but, more than safety concerns, you can't eat ice. or, at least, it's not very nutritional. then i remembered the eye-opening "of course" experience i had applying Mason Jar Values' healthy, homemade Jell-O recipe (try strawberry-banana Odwalla... mmmmmm). then, it hit me. gelatin can totally look like ice! a gelatin "ice" castle cake... i was on a mission. and here are the happy results. but can you guess what made it a real success?and, in the world of the blogosphere, it's worth saying i really mean this... it's the same measure of success i get each year as my dear Sweet One grows and grows -- from balloon-enthralled pre-walker to chit-chatty first-grade girly girl -- the smile on her face. "my Mom is the best cooker ever!" sniff, sniff. i'm gettin' all melty over here. and of course she's worth it.

the preemptive notes, in the lead-up to the actual recipe:

  • this is very easily adapted. use whatever juice you like, or just water if you care only about a pure "ice" look and not so much about any nutritional value. after some earlier experiments, however, i do urge you to stick to using a sand castle pail and not the smaller sand-castle forms out there, since the pails stand solidly flat on their own. i tried some cute little forms during a trial run, propping them level with an assortment of napkins and wash clothes and office clips. good night. all that, and they didn't really work. also, even if your chosen forms can stand on their own, be sure to check for small holes (actual sand castle forms typically have them for water to drain out, and gelatin will drain out just as easily!). wash in your dishwasher before use to sanitize. mine held up fine, even on the bottom rack.
  • how big a pail? this recipe is based on a sand castle pail i bought at the dollar store. i eye-balled the size compared to past gelatin adventures and, remarkably, estimated correctly. in this case, four 9-by-13 pans worth of gelatin snack recipes (think knock-off Jell-O) filled this pail perfectly. if you end up with too much, add the leftovers to a pan and let firm up in the refrigerator as some extra snacks. if you end up with too little, it's no problem to mix up some more and add to the top. gelatin is very forgiving.
  • the color of your sugar crystals matters. i expected the blue sugar crystals to keep their exact look suspended in the gelatin. however, as soon as colored sugar gets wet, all the color comes off. in our case, this ended up creating a very cool blue-green effect when mixed with the slightly yellow white grape juice gelatin mixture. it was a happy accident and ended up turning out better than i had envisioned.
  • deciding when the gelatin is "semi-firm" is a tricky business. what i suggest is doing things in waves. check at the first hour by sprinkling some sparkles on the surface. they will very likely sink right away, which means it's not technically semi-firm yet, but you're still adding some nice additions to the top of your castle, which you won't be able to reach by the time itisall semi-firm anyway. after the first hour, repeat every half-hour until you're satisfied with your additions. by the end, you'll be using the handle of your spoon to depress the additions into the mold by only a couple inches. don't worry about hole-poke marks; the gelatin will ooze back over itself if it's still semi-firm, like some kind of primordial goop. which leads to the next consolation: this is a very forgiving stage of things. don't really have time to check every 30 minutes? don't sweat it. gelatin knows no stopwatch, especially when it's this big a batch.
  • the finished product can tend to be rather "runny," especially when dealing with a larger batch like this. if i had to do it again, i would have put a clean white rag down flat on top of the serving tray and invert the mold on top of that. it would still look like "snow" and serve the double purpose of soaking up some of the runny liquid so that the confectioner's sugar doesn't dissolve into a soupy mess. as an easy alternative, though, just do what i did and add the confectioner's sugar at the last moment.
  • make room in your refrigerator if you can manage it so that the empty pail mold and tray can be set on a shelf with enough head space above to pour the liquid in and, later, stir in the additions. the less you have to move the pail o' gelatin, the better. trust me. let's just say i was up until 12:30 a.m. after spilling one-quarter of this mixture on the floor during one of the more involved addition-stirring rounds. the upside? if you do spill some, it's easy enough to mix up more gelatin mixture and add on top of whatdidn'tspill out with no ill consequence. a dessert that forgives as well as tastes and looks good? thank your birthday stars, mommas!

Gelatin "Ice Cake" recipe

Ingredients

16 packets gelatin (about 16 T)
120 liquid ounces white grape juice (e.g., one 96 oz jug, plus 24 oz bottle)
Additions of choice: we used blue sugar crystals and clear, sparkly sugar sprinkles
Confectioner's sugar

Materials

Sand castle pail form (dollar store size used in this recipe)
Tray
Wooden spoon
Serving tray or cake stand

Steps

Note: The making of the gelatin itself follows the basic recipe for making four batches of gelatin snacks, decreasing the liquid by 1/4 cup per batch, so 1 cup less liquid total.
1. Heat 11 cups juice to boiling.
2. Meanwhile, pour 4 cups juice into a large bowl. Sprinkle gelatin over top and let stand to soften while the other juice boils, 1 minute or more.
3. Set the pail on a tray and position in or near the refrigerator (see notes above). Coat interior of pail well with cooking spray.
4. Add hot juice to gelatin mixture. Hand-stir for 5 minutes.
5. Pour mixture into pail mold. Refrigerate.
6. Check firmness at one-hour mark, then every hour or half-hour beyond that (see notes). Add additions as desired. Gelatin is semi-firm when additions sit on top of the mixture but you can still use the handle of a wooden spoon to poke the sprinkles and crystals down into the mixture.
7. Continue to refrigerate for 3 hours or overnight.
8. Invert pail of gelatin cake onto serving tray or cake stand, on top of a white cloth if available (see notes). Sprinkle confectioner's sugar around the castle like snow. Sprinkle more sparkly sprinkles or blue sugar crystals over top of confectioner's sugar and castle, as desired.

i set this castle on our kitchen table, where we were going to put the food. this room happens to have some tall windows, and the effect was gorgeous. it sparkled all on its own! if you don't have the advantage of natural light indoors or a sunny day outdoors, consider sticking a little battery-powered LED light into the bottom. that was my back-up option. if you try it, please please please leave a comment to let us know how it worked...

to add a candle on top, i stuck the pointy end of a wooden skewer into the bottom of the candle, broke off the skewer to length and gently impaled the castle. it worked quite well. and, more important of course, it was a special request by Sweet One.

the self-conscious blogger in me would like to note that i had ordered some high-quality gelatin and colored sugar online but it didn't arrive in time. that said, Winco and Wilton's worked just fine. anyone who's done research on gelatin or had more experience with large batches of different varieties, please share your findings in the comments! (also, have I ever mentioned that i think the cow is the greatest animal on earth?)

below you'll find affiliate linksto some of the products i recommend for Amazon shoppers looking to replicate our "Frozen" gelatin ice cake and other party features:

"Frozen" gelatin ice castle cake recipe (2024)

FAQs

How long to thaw frozen cake before frosting? ›

Thin cake layers will usually thaw in 2-3 hours, larger cakes can take quite a bit longer. Cheesecakes should always be thawed overnight in the fridge, as should any cake which normally needs storing in the fridge.

How long does a dq cake need to thaw? ›

Ice cream cake are frozen confections, so they must be stored in the freezer. However, they can be quite hard when they first come out, so we recommend removing them from the freezer and allowing them to thaw for ten to twenty minutes.

How long to take ice cream cake out of the freezer before serving? ›

The goals is to allow the cake to rise in temperature enough to slice and eat without melting the ice cream. Remove your cake from the freezer 10 to 20 minutes before serving. Keep a close eye on your cake. Keep it out of direct sunlight and away from other warm areas in your kitchen.

How to make gelatin ice cubes for cake decorating? ›

Add a bit of Sprite over the melted gelatine and mix it to bring the gelatine to room temperature. Then, pour this over the Sprite and mix well to combine. Pour the mixture into a container. Place it into the refrigerator until it's completely set.

Do you thaw frozen cake layers before frosting? ›

However, don't be too quick—make sure that your layers are about halfway thawed before you apply any icing. I have found that cakes will crack the finished icing as they expand in the defrosting process.

Do you unwrap a frozen cake to thaw? ›

Simply transfer your wrapped slices or layers from the freezer to the refrigerator a day ahead of serving (although cake generally thaws within 8 hours if you are pressed for time). One important tip – thaw frozen cake in its wrapping to prevent condensation from forming and turning the sponge soggy and wet.

How to seal a cake before frosting? ›

To crumb coat a cake, add a small amount of icing to the sides and top of your cake, spreading with your bench scraper or offset spatula to cover the cake evenly. You are only aiming to use a small amount of frosting here: This layer is purely intended to seal in the crumbs and create a smooth surface for frosting.

How to cut a frozen cake? ›

Steps to cut the cake
  1. Boil one cup of water, on low heat.
  2. Take a sharp knife and submerge it into the hot water.
  3. Place the frozen cake roll over the cutting board and slice the cake.
  4. After each slice, you need to submerge the knife into the hot water.

How long will ice cream cake last outside? ›

3. How long can your ice cream cakes stay unrefrigerated? The dry ice provided will be able to keep the cake chilled without refrigerated for up to 1 hour. You can buy extra dry ice for your cake, however we do not recommend leaving the cake out for 1 ½ hours or more.

How to keep an ice cream cake from melting? ›

The best way to store an ice cream cake is in a freezer, where the temperature is maintained below the freezing point of water, ensuring the cake retains its desired consistency and form.

How do you soften ice cream for cake? ›

To soften ice cream to make ice cream cake, transfer it from the freezer to the refrigerator for 30 minutes or until it reaches a spreadable consistency.

How long should cake sit out before serving? ›

~ Cake Storage: The cake should be refrigerated up to 1-3 hours before serving. Remove cake from refrigerator and let sit at room temperature to develop best flavor and texture. Tiered cakes take longer to warm up, so let sit at least 2 hours before serving.

How long can ice cake stay out of the fridge? ›

How long can cake sit out unrefrigerated? If your cake is frosted with buttercream, it will last covered at room temperature for up to four days. However, it is best to refrigerate cakes with other frostings such as cream cheese or ganache. A fully covered unfrosted cake will last for up to 2 days at room temperature.

How to make ice for cake? ›

To ice a cake, first make your icing by combining confectioner's sugar with boiling water, then stirring until it gets to your desired consistency. Flavor it with vanilla and add a few drops of food coloring if desired. Place a spoonful of icing on top of the cake and spread it evenly across the top and sides.

What tool can I use to frost a cake? ›

Offset spatulas

They're the tool of choice for creating both clean lines and dramatic whirls of frosting on everything from simple birthday cakes to tiered showstoppers. Pro tip: Use a mini offset spatula for decorating and a large one for transferring the cake from turntable to plate.

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