A fluffy banana and oat sponge, frosted with creamy Greek yogurt and peanut butter, decorated with fresh strawberries and blueberries. Sweet, wholesome, and made entirely for your dog. No sugar, no flour, no guilt.
🍌 The Banana Oat Sponge
🤍 The Yogurt Frosting
🎨 Decoration
If you do not have oat flour, simply blend 2 cups of plain rolled oats in a food processor or blender until they reach a fine flour consistency. It takes about 30 seconds. This is the base of your sponge and replaces regular wheat flour entirely — it is naturally gluten-light and much easier on a dog's digestion than white flour.
In a large bowl, mash the bananas until completely smooth with no lumps. Add the eggs, Greek yogurt, and peanut butter and mix well until fully combined. Fold in the oat flour and baking powder and stir until a thick, smooth batter forms. It will be denser than a human cake batter — that is correct. Do not be tempted to thin it out.
Preheat oven to 175°C (345°F). Grease two 18cm round cake tins with a tiny amount of coconut oil and line the bases with baking paper. Divide the batter evenly between the tins and smooth the tops. Bake for 25–30 minutes until a skewer or toothpick inserted into the centre comes out clean. The tops should be lightly golden and spring back when gently pressed. Cool in the tins for 10 minutes, then turn out carefully onto a wire rack to cool completely. Do not frost while warm.
Beat the Greek yogurt and peanut butter together until smooth and creamy. If the yogurt is very runny, strain it through a fine mesh sieve lined with kitchen paper for 30 minutes to thicken it — this gives the frosting enough body to hold on the cake sides without sliding off. Refrigerate for 15 minutes before using.
Place the first cake layer on a serving plate or board. Spread a generous layer of yogurt frosting across the top all the way to the edges. Place the second layer on top, flat-side up. Frost the top and sides with the remaining yogurt frosting. Work quickly as the frosting is softer than buttercream — a rustic, imperfect finish is completely fine and actually looks more charming.
Arrange halved strawberries, blueberries, and banana rounds across the top. You can press blueberries gently around the sides too for a beautiful full effect. Add a single candle for the photo (remove before serving), sing happy birthday with full commitment, then let your dog destroy it. This is the correct order of events.
Every ingredient earns its place:
Banana oat cake — naturally sweet, fibre-rich, and surprisingly fluffy
Yogurt and peanut butter frosting — creamy, probiotic, irresistible
Second banana oat round — same golden sponge on top
Thick Greek yogurt and peanut butter — coats the whole cake
Strawberries and blueberries — antioxidants and stunning colour
Fresh banana rounds — the finishing touch your dog will eat first
This is a lighter cake — but banana is naturally high in sugar so keep portions sensible:
Serve as their birthday meal — count it against their daily calorie total.
Store in the fridge for up to 2 days — the yogurt frosting is perishable so do not leave at room temperature. Freeze unfrosted cake layers for up to 1 month. Thaw overnight and frost fresh on the day.
On a hot day, freeze the assembled cake for 2 hours before serving — it becomes an incredible frozen birthday treat. The yogurt frosting firms up beautifully and the banana sponge goes slightly chewy. Perfect for summer birthdays.
This is a birthday treat — serve once for the occasion, not as a regular part of their diet.
Banana is naturally high in sugar. While it is a safe and nutritious fruit for dogs, large amounts regularly can contribute to weight gain, especially in less active or older dogs.
The yogurt in this recipe provides useful calcium. This is primarily a treat recipe rather than a complete nutritional meal — pair with a balanced daily diet and enjoy it as the celebration it is.
More of a meat lover? We have a full birthday meatcake too.
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