Preheat the oven to 175°C top and bottom heat. Line a rectangular baking tray or baking dish (approximately 20x30 cm) with parchment paper.
In a large bowl, mix the whole spelt flour, almond flour, baking powder, baking soda, and coconut blossom sugar.
In another bowl, whisk the egg yolks with the yogurt, almond milk, melted coconut oil, and vanilla extract.
Add the wet mixture to the dry ingredients and mix briefly until a smooth batter forms.
Whip the egg whites stiff with a pinch of salt and fold in 2 times.
Pour the batter into the baking pan, smooth it out, and bake for 25 minutes, until a skewer comes out clean. The longer you bake it, the drier it becomes.
Let it cool completely. Mix the yogurt with vanilla and spread it over the cake.
Sprinkle with sprinkles just before serving, as they will otherwise melt.
Cut into slices about a centimeter thick and serve.
Tips
- For extra lightness: whip the egg whites separately until stiff and fold them into the batter.
- Make it gluten-free by replacing spelt flour with gluten-free oat flour.
- Prefer vegan? Use plant-based yogurt and a chia or flaxseed egg.
- Freeze pieces without topping, this way the texture remains perfect.
- Make it even more festive with fresh fruit on top of the yogurt layer.
Storage instructions
- In the refrigerator: airtight packed for up to 4 days.
- In the freezer: for up to 2 months, individually wrapped in foil or bags.
- Reheating: let it come to room temperature briefly or 10 seconds in the microwave (without topping).