Soft Strawberry Smash Cake (No Refined Sugar)
This little strawberry smash cake is the kind of recipe that makes a first birthday feel special, without any of the fussy decorating. It comes together quickly enough for a weeknight, with fresh strawberries and no refined sugar, so you can hand a hunk to your one-year-old and feel good about it.
Baked as a small 6-inch round, the cake comes out tender and moist, full of real strawberry flavor and just sweet enough. It is soft enough for a baby to squish, and it tastes so much better than anything from a box.
Why This Little Cake Works
The combination of yogurt and banana keeps the crumb exceptionally moist without a lot of fat or sugar. That means a cake soft enough for little fingers to dig into, with a texture that stays nice even after a day or two.
I love that it uses a whole basket of strawberries. Half go into the batter so you taste the fruit in every bite, and the rest get scattered on top just before serving for a fresh, juicy finish. No food coloring, no refined sugar, just honest berry flavor.
Ingredients
- 1 cup (125g) whole wheat pastry flour or all-purpose flour: pastry flour gives a softer crumb, but either will work.
- 1 teaspoon baking powder
- ¼ teaspoon baking soda
- ⅛ teaspoon fine sea salt
- ½ cup (120g) plain full-fat yogurt: room temperature, whole milk yogurt works best.
- ⅓ cup (80ml) avocado oil or melted coconut oil: any neutral oil is fine.
- 2 tablespoons maple syrup, optional: adds a little extra sweetness; leave it out for a completely sugar-free cake.
- 1 large ripe banana: the riper and spottier, the sweeter your cake will be.
- 1 large egg: room temperature.
- 1 teaspoon vanilla extract
- 2 cups (250g) fresh strawberries, hulled and finely diced, divided: reserve ½ cup for topping.
Variations / Substitutions
- Gluten-free: use a 1:1 gluten-free all-purpose flour blend in place of the wheat flour.
- Egg-free: replace the egg with a flax egg (1 tablespoon ground flaxseed mixed with 2½ tablespoons water, set for 5 minutes).
- Dairy-free: swap the yogurt for a thick plant-based yogurt and use refined coconut oil.
- Different sweetener: the banana does most of the work, but you can use 2 tablespoons of honey if your child is over one year old.
- Other fruit: this recipe works beautifully with raspberries, blueberries, or diced ripe peach in place of the strawberries.
If you want a similar baby cake without the berries, try a Banana Yogurt Smash Cake.
How To Make Strawberry Smash Cake
Step 1: Whisk the Wet Ingredients
In a medium bowl, whisk the banana until completely smooth. Add the yogurt, oil, maple syrup (if using), egg, and vanilla. Whisk until the mixture looks evenly combined and a little glossy, about 30 seconds.
The batter will be fairly loose at this stage, and you should not see any lumps of banana. Giving it a good whisk now means less mixing once the flour goes in.
Step 2: Fold in the Dry Ingredients
Sprinkle the flour, baking powder, baking soda, and salt over the wet ingredients. Use a flexible spatula to fold everything together just until the flour disappears. A few small streaks are fine.
Overmixing makes the cake tough, so stop as soon as the dough looks uniform. The batter will be thick but still pourable.
Step 3: Fold in the Strawberries and Fill the Pan
Preheat the oven to 350°F (175°C) and grease a 6-inch round cake pan with oil. Line the bottom with a circle of parchment paper for easy release. Gently fold 1½ cups of the diced strawberries into the batter, then scrape it into the prepared pan and smooth the top. Scatter the remaining ½ cup of strawberries over the surface.
The berries will sink a little as the cake bakes, creating pockets of jammy strawberry inside. No need to press them into the batter, just let them rest on top.
Step 4: Turn Out and Finish with Strawberries
Bake for 20 to 25 minutes, until the top is golden and a toothpick inserted in the center comes out clean. Let the cake cool in the pan for 10 minutes, then run a knife around the edge and invert it onto a plate. Flip it right side up and pile extra fresh sliced strawberries right on top.
Serve warm or at room temperature, cut into wedges. The top will be studded with soft berries, and the whole thing smells like a strawberry shortcake.
Tips for a Tender Smash Cake
- Pick a spotted banana.: The riper the banana, the more natural sweetness it brings, so you can skip the maple syrup completely if your banana is heavily speckled.
- Don’t skip the parchment.: A parchment round guarantees the cake releases cleanly, which is especially helpful when you are baking for a smash cake that needs to look nice.
- Grease well.: Even with parchment, coat the pan sides generously, since the berries tend to stick a bit as they bake.
- Let it cool before handling.: The cake is fragile when hot, but firms up as it cools. Give it at least 30 minutes if you need to transport it.
- Double for a crowd.: Multiply the ingredients by two and bake in an 8-inch round pan for a bigger birthday cake.
Bake times by pan size:
| Pan size | Bake time |
|---|---|
| 6-inch round | 20 to 25 minutes |
| 8-inch round | 25 to 30 minutes |
| 12-cavity muffin pan | 15 to 18 minutes |
Storing Leftover Smash Cake
- Refrigerate: keep any leftover cake in an airtight container in the fridge for up to 3 days. The banana and yogurt keep it moist, so it will not dry out as fast as other cakes.
- Reheating: warm individual slices in the microwave for 15 to 20 seconds, just until the chill is off. It tastes especially good with a small dollop of plain yogurt on the side.
Frequently Asked Questions
Can I make this cake without an egg?
Yes, a flax egg works well. The texture will be slightly more tender and the crumb a touch more delicate, but it holds together for a smash cake just fine.
Is the cake sweet enough for a birthday without sugar?
Yes, a truly ripe banana and the natural sweetness of strawberries make a cake that tastes pleasant and fruity, though it is not as sugary as a typical birthday cake. If you want a bit more sweetness, include the optional maple syrup.
Can I freeze it?
You can freeze the unfrosted cake, well wrapped, for up to a month. Thaw overnight in the fridge and bring to room temperature before serving.
What frosting goes with it?
A simple whipped cream or a lightly sweetened cream cheese frosting works nicely if you want to make it more of a party cake. Just keep it light so the strawberry flavor still shines.
Strawberry Smash Cake Recipe
Ingredients
Method
- Whisk the banana smooth in a bowl. Add yogurt, oil, maple syrup, egg, and vanilla, and whisk until combined.
- Sprinkle flour, baking powder, baking soda, and salt over the wet mixture and fold just until no dry streaks remain.
- Preheat the oven to 350°F (175°C) and grease a 6-inch round cake pan with a parchment liner. Fold 1½ cups of the strawberries into the batter, fill the pan, and scatter the remaining ½ cup on top.
- Bake 20 to 25 minutes until a toothpick comes out clean. Cool 10 minutes, turn out onto a plate, and pile extra fresh strawberries on top.
