Easy Rainbow Sprinkle Cake with Vanilla Frosting
This Rainbow Sprinkle Cake is filled with sprinkles and topped with vanilla buttercream! It's the best quick and easy funfetti sheet cake!
Servings: 9 slices
Calories: 521kcal
Equipment
- 8x8 inch pan with parchment paper
- Mixing bowls
- Measuring spoons
- Whisk
- Spatula
Ingredients
Rainbow Sprinkle Cake
- 1¾ cups (218.75 g) all-purpose flour weighed in grams or spooned and leveled
- ¾ teaspoon baking powder
- ¼ teaspoon baking soda
- ¾ teaspoon salt
- 1 cup (200 g) granulated sugar
- ½ cup (118.29 ml) vegetable oil or other neutral oil
- 1 teaspoon vanilla extract
- 1 large egg room temperature
- ½ cup (118.29 ml) Lifeway Rainbow Cake Lowfat Kefir* room temperature
- ¼ cup (59.15 ml) hot water
- ⅓ cup (53.33 g) rainbow sprinkles jimmies or quins
Vanilla Buttercream
- ½ cup (113.5 g) unsalted butter room temperature
- 2 cups (240 g) powdered sugar
- ¾ teaspoon vanilla extract
- 2 tablespoons milk or cream more/less depending on consistency preference
Instructions
- Preheat oven to 350°F. Grease and line an 8-inch square pan with parchment paper.
- In a large bowl, whisk together the flour, baking powder, baking soda, and salt.
- In a medium bowl, whisk together the sugar, vegetable oil, vanilla extract, egg, and kefir.
- Stir the wet ingredients into the dry ingredients until a few flour streaks remain. Then, mix in the hot water just until combined.
- Pour the batter into the prepared pan. Bake on the middle shelf until a toothpick comes out of the center clean (about 35-45 minutes).
- Let the cake cool in the pan, then lift it out onto a wire rack to finish cooling.
- While the cake is cooling, make the frosting by mixing together the butter, powdered sugar, vanilla extract, and milk.
- Spread the frosting over the cooled cake. To create a colorful tie-dye effect, place tiny drops of food coloring around the frosting and swoop it around with a knife or spatula. Top with sprinkles, slice, and enjoy!
Notes
Lifeway Kefir: This recipe is sponsored by Lifeway Foods. Their Rainbow Cake Kefir is a limited edition flavor. It can be substituted with their plain kefir or regular buttermilk.
Storage: Store the cake at room temperature for 3 days, in the refrigerator for 1 week, or in the freezer for 1 month.
Nutrition
Calories: 521kcal | Carbohydrates: 74g | Protein: 4g | Fat: 24g | Saturated Fat: 9g | Polyunsaturated Fat: 8g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 50mg | Sodium: 279mg | Potassium: 44mg | Fiber: 1g | Sugar: 55g | Vitamin A: 376IU | Vitamin C: 0.01mg | Calcium: 51mg | Iron: 1mg
