• Preheat the oven to 350℉.
• Line the glass baking dish with parchment paper.

Make The Oat Flour

• In a blender, combine 1 cup oats and 1 tsp baking powder. Blend until it becomes a fine oat flour.

Make The cake

• Add the rest of the ingredients: 1 frozen banana, 1 cup frozen strawberries, 1 egg, and 4 tbsp peanut butter powder to the blender. Blend until it becomes a smooth batter.
• Pour the batter into the lined baking pan.
• Bake for 20 minutes.
• Remove the cake from the baking dish. Place on the cooling rack. Remove parchment paper from the cake.
• Allow the cake to to cool on the wire rack for 20 minutes.

Make The Icing

• Combine ½ cup goat milk yogurt, 40 g peanut butter powder, 6 tsp tapioca flour, and 1 tsp xanthan gum until mixture is thick.
• Add the icing to a plastic bag and snip the bottom corner to pipe icing.

Build The Cake

• Cut the cake in half and pipe the inside with icing.
• Stack the second layer on top and pipe icing. The cake will be 2-tiered!
• Decorate with a birthday candle and dog kibble!