Set the oven to 175 degrees C fan.
In a bowl whisk eggs, sugar and vanilla until thick, creamy and white.
Melt the butter and mix it with the milk. Blend it with the egg mixture.
Mix flour, salt and baking powder and add the mixture to the batter. Don't whisk too hard as this will toughen the muffin. Preferably use a pan scraper to mix.
Make the crumble by pinching butter, oats, almond flour and brown sugar together.
Cut the chocolate into smaller pieces.
Line 1 tray with paper muffin cases. Fill the muffin cases with raspberries, potato starch, white chocolate pieces and batter. Fill them quite high up, almost to the top.
Top the muffins with the crumble, about 1/2-1 tbsp.
Bake in the middle of the oven for about 15 minutes.