healthy smash cake

Vanilla Oat Smash Cake with Yogurt Frosting

  • Author: Amy Palanjian
  • Prep Time: 15
  • Cook Time: 18
  • Total Time: 33 minutes
  • Yield: 1 smash cake (or serves 6-8) 1x
  • Category: Cake
  • Method: Baking
  • Cuisine: American


This fresh smash cake has a base of rolled oats and is simply decorated—so your little one can dig right into the deliciousness. This recipe is baked in 5-inch cake pans to create a small, personally sized cake for your newly minted toddler!


  • 1 recipe Greek Yogurt Frosting
  • 1 1/2 cups oat flour
  • 1 teaspoon baking powder
  • 1/4 teaspoon salt
  • 6 tablespoons unsalted butter, melted and slightly cooled
  • 1/2 cup maple syrup
  • 2 eggs, lightly beaten
  • 1 teaspoon vanilla extract
  • 1 cup fresh berries, to garnish


  1. Prepare the Greek Yogurt Frosting.
  2. Preheat the oven to 350 degrees F. Grease three 5-inch cake pans and place a round of parchment inside of each. Grease again. (Trace the pan onto parchment paper and cut out three times. Trim slightly to fit inside the bottom of the pan.)
  3. In a medium bowl, whisk together the flour, baking powder, and salt.
  4. In a separate medium bowl, whisk together the melted butter, maple syrup, eggs, and vanilla until smooth. Add the flour mixture and stir until just combined.
  5. Divide the batter evenly between prepared cake pans. Bake until a toothpick inserted in the center of the cake comes out clean, about 18-20 minutes. Remove from oven and place pans onto a wire rack. Let cool at least 30 minutes in the pans.
  6. Carefully turn cakes out onto a cooling rack and let cool fully to room temperature. Discard parchment paper rounds.
  7. Place one cake on your serving plate. Top with about 1/3 cup of frosting, spreading it in an even layer just past the edges. Add the second, repeat with frosting, and then repeat with the third cake . Use an offset spatula or knife to scrape off the frosting overhang for a “naked” cake look, or use additional frosting to coat the entire cake.
  8. Top with berries and store in the fridge if needed until 30-60 minutes before ready to serve. Let the birthday kiddo dig in!


Greek Yogurt Frosting
Place 1 cup whole milk yogurt in a sieve or fine-mesh strainer lined with a double layer of cheesecloth or paper towels with a bowl underneath. Let sit for 30 minutes or up to overnight. Transfer the yogurt to a bowl and stir in 2-3 tablespoons maple syrup and 1/4 teaspoon vanilla extra. Refrigerate until ready to use.

To Make this Cake Ahead: You can bake the cakes up to a day ahead. Let cool fully on wire racks and store in an airtight container. Frost soon before serving. You can make the frosting up to a day ahead as well.

To Bake this as a Regularly Sized Layer Cake: Double the ingredients (except the salt) and bake in two 8-inch round cake pans. Bake and frost as directed.

To Make as Cupcakes: Use 3 tablespoons of the batter in each paper cupcake liner to make 8 cupcakes. Bake for 18-20 minutes or until golden brown around the edges and a cake tester inserted into the center comes out clean (I did 20 minutes). The rest of the recipe is the same.

To make oat flour: Place rolled oats into a blender. Cover and grind until resembles a fairly fine flour. Measure the amount needed for the cake after grinding.

To Make these Egg-Free: 

1 cup oat flour
1/2 all purpose flour
1 tablespoon ground flaxseed
1 teaspoon baking powder
1/4 teaspoon salt
6 tablespoons unsalted butter, melted and slightly cooled
1/2 cup maple syrup
1 very ripe banana, mashed (about 1 cup sliced banana)
1 teaspoon vanilla extract

Then proceed with the recipe. They may need another 2-4 minutes to bake, but test it with a cake tester inserted into the center to be sure. It should come out clean. Let it cool completely in the pan. Store it in the fridge if you need to make it ahead.

To Make Dairy-free: Use melted and cooled coconut oil in place of the butter.

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