Strawberry jello cake recipe is the ultimate summer dessert! Packed full of sweet strawberries and cool cream all on top of a red and white swirled cake. This tasty dessert is perfect for sharing at cookouts, picnics, and summer parties!
Grease a 9x13 inch pan. Prepare the cake mix according to the package directions, mixing in the egg whites (or whole eggs), oil and water as listed on the package. I've listed the most common egg, oil and water amounts in the ingredients but use the amounts listed on your package.
Preheat the oven to 350 degrees for a metal pan and 325 degrees for a glass pan. Pour the batter into a 9x13 pan and bake according to the package directions, usually 28-35 minutes.
Let the cake cool for at least 15-20 minutes or until cool to the touch.
Make The Strawberry Sauce
In a medium sauce pan add 7 ounces strawberries (1 cup), sugar and lemon juice. Cook until the sauce begins to thicken, about 6 minutes.
Once the cake is cool, poke holes in the cake in rows for the Jell-O, about 9-10 rows down the longer side of the pan. Use the handle of a wooden spoon or a similar tool to poke holes in even lines all the way down the cake.
Add Jello And Strawberry Sauce Layers
Prepare the jello in a pourable container. Add 1 cup of boiling water to the mix and stir until the gelatin dissolves. Add 1/2 cup of cold water and continue stirring for a minute.
Carefully pour the prepared Jell-O evenly over top of the cake. Pour evenly so all of the holes are filled with Jell-O.
Spread the strawberry sauce evenly over the top of the entire cake. Chill the entire cake for at least 4 hours (or overnight) so the jello and the strawberry sauce both have plenty of time to set.
Decorate The Cake
Top the cake with the whipped topping and decorate with sliced strawberries. Place in the refrigerator until you are ready to enjoy!
The cake mix flavor can be swapped out easily for other flavors such as yellow cake, strawberry cake or even cherry chip. Chocolate or other darker-colored cakes don't typically work as well because it's then harder to see the red jello in the cake. Follow the directions on your box of cake mix to know how much water, oil and eggs to add to your cake and how long to bake it.
For the strawberry sauce you can use fresh or frozen strawberries. If you choose frozen strawberries you will need to cook the sauce for an extra few minutes.
When the strawberry sauce is thick enough that it can coat the back of a spoon, the sauce has cooked enough.
You can use any flavor of gelatin you want. Keep in mind using strawberry enhances the strawberry flavor. Using other flavors may give your cake a different combination of flavors. (Try raspberry, it's delicious too!)
When you are chilling your cake, make sure the cake is sitting flat. If your cake leans, the liquid in the cake will also lean to one side.