Description

Rainbow Jello Poke Cake is a fun and colorful dessert made with soft white cake infused with vibrant layers of fruity gelatin. Each slice reveals beautiful rainbow streaks inside, topped with fluffy whipped cream for a light and refreshing finish. Perfect for birthdays, holidays, and family gatherings, this eye-catching cake is easy to make and always impresses guests with its playful look and delicious flavor.

Ingredients

Scale

2 ½ cups all-purpose flour
2 ½ teaspoons baking powder
½ teaspoon salt
¾ cup unsalted butter, softened
1 ¾ cups granulated sugar
4 large egg whites
1 tablespoon vanilla extract
1 cup whole milk
1 box (3 oz) strawberry gelatin
1 box (3 oz) lemon gelatin
1 box (3 oz) lime gelatin
1 box (3 oz) berry blue gelatin
4 cups boiling water (1 cup per flavor)
4 cups cold water (1 cup per flavor)
2 cups heavy whipping cream
¼ cup powdered sugar
1 teaspoon vanilla extract
Colorful sprinkles (optional)

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Instructions

Preheat oven to 350°F (175°C) and grease a 9×13-inch baking pan.
Whisk together flour, baking powder, and salt in a bowl.
Beat butter and sugar until light and fluffy.
Add egg whites one at a time, mixing well after each addition. Stir in vanilla.
Alternate adding dry ingredients and milk, mixing until smooth.
Pour batter into prepared pan and bake for 30–35 minutes. Cool completely.
Poke holes evenly across the cooled cake using the handle of a wooden spoon.
Dissolve each gelatin flavor in 1 cup boiling water, then stir in 1 cup cold water.
Carefully pour different gelatin colors into separate rows of holes.
Refrigerate for at least 4 hours until fully set.
Whip heavy cream with powdered sugar and vanilla until soft peaks form.
Spread whipped cream over chilled cake, decorate with sprinkles, slice, and serve.

Notes

Allow gelatin to cool slightly before pouring to prevent a soggy texture. Chill the cake thoroughly for clean slices. Store covered in the refrigerator for up to 4 days. Do not freeze, as gelatin texture may change. You can substitute homemade stabilized whipped cream for longer-lasting topping.

Prep Time: 30 minutes
Cook Time: 35 minutes
Category: B
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 slice
Calories: 320
Sugar: 32g
Sodium: 220mg
Fat: 14g
Saturated Fat: 9g
Unsaturated Fat: 4g
Trans Fat: 0g
Carbohydrates: 45g
Fiber: 0g
Protein: 4g
Cholesterol: 55mg