To make these workmanlike muffins you will need to start by placing the room temperature butter and sugar in a large bowl. Whisk the ingredients until combined and the mixture is soft. Then add 1/2 teaspoon of lemon zest, 1/2 teaspoon of salt and sift in: 1 teaspoon of vanillin, 270 g of flour and 2 teaspoons of baking powder.
Now divide the mixture into two parts. Now pour the fruits into two separate bowls and flour them with 2 tablespoons of flour. This will prevent the mixture from turning blue or red.
Add the chopped strawberries to one part of the mixture and the blueberries to the other. Mix gently with a spatula.
Pour the mixture into 12 ramekins, reaching a few millimetres below the rim. In the ramekins with the strawberry mixture add a cube of dark chocolate, so that when you go to cut them you will discover a delicious surprise inside: beautiful to the eyes, but even more to the palate!
Preheat the oven to 190°C (394°F) static. Then prepare the crumble to sprinkle over the muffins so they look even better: in a bowl combine 2 tablespoons of flour, 5 tablespoons of sugar, 1/2 teaspoon of cinnamon and 2 tablespoons of melted butter. Mix with a whisk until the mixture resembles crumbs.
Sprinkle the crumble over the muffins and bake in a preheated static oven for about 20 minutes. However, do the toothpick test: if you pierce a muffin the toothpick is dry then your muffins are ready.
Take them out of the oven and wait about 30 minutes before enjoying them. Enjoy your meal!
The muffins can be stored under a glass bell at room temperature for 2-3 days, do not put them in the fridge! Otherwise you can freeze them and thaw them if needed!