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Perfect Oat Milk Chocolate Chip School Bus Birthday Cake

oat milk chocolate chip school bus birthday cake - featured image

A quick and easy dairy-free chocolate chip cake shaped like a school bus, perfect for birthday parties and kid-friendly celebrations. Moist and tender with oat milk and mini chocolate chips.

Ingredients

Scale
  • 2 ½ cups (312g) all-purpose flour
  • 2 ½ teaspoons baking powder
  • ½ teaspoon baking soda
  • ½ teaspoon salt
  • 1 ¾ cups (350g) granulated sugar
  • ½ cup (113g) unsalted butter, softened
  • 1 cup (240ml) oat milk, room temperature
  • 2 large eggs, room temperature
  • 2 teaspoons pure vanilla extract
  • 1 cup (175g) mini semi-sweet chocolate chips
  • 3 cups (360g) powdered sugar
  • 1 cup (227g) unsalted butter, softened (for frosting)
  • 2 tablespoons (30ml) oat milk (for frosting)
  • Yellow food coloring, a few drops
  • Black decorating gel or melted dark chocolate (for details)

Instructions

  1. Preheat oven to 350°F (175°C). Grease the school bus cake pan thoroughly with butter and lightly dust with flour.
  2. In a large bowl, whisk together flour, baking powder, baking soda, and salt.
  3. Using a mixer, beat softened butter and granulated sugar until pale and fluffy, about 7 minutes (8 minutes if by hand).
  4. Beat in eggs one at a time, then add vanilla extract.
  5. Add dry ingredients in three parts, alternating with oat milk, starting and ending with dry ingredients. Mix gently on low speed.
  6. Fold in mini semi-sweet chocolate chips gently with a spatula.
  7. Pour batter into prepared pan and smooth the top. Bake for 35-40 minutes until a toothpick inserted comes out clean or with a few moist crumbs.
  8. Cool cake in pan for 10 minutes, then transfer to a cooling rack to cool completely.
  9. For frosting, beat softened butter until creamy. Gradually add powdered sugar, mixing on low speed.
  10. Add oat milk and yellow food coloring until smooth and spreadable.
  11. Spread frosting evenly over cooled cake using an offset spatula or butter knife.
  12. Use black decorating gel or melted dark chocolate to add windows, wheels, and other bus details.

Notes

Use room temperature eggs and oat milk for best mixing results. Fold chocolate chips gently to avoid breaking. Rotate pan halfway through baking for even cooking. Chill cake slightly if kitchen is warm before frosting to prevent melting. For gluten-free version, use 1-to-1 gluten-free flour blend and reduce baking powder to 2 teaspoons. Vegan adaptation possible with flax eggs and vegan butter substitute.

Nutrition

Keywords: oat milk cake, chocolate chip cake, school bus cake, birthday cake, dairy-free cake, kid-friendly dessert, easy cake recipe