Apple Muffin Oven or Dutch Oven

Ingredients: 250 grams flour
1 teaspoon baking powder,
1/2 teaspoon baking soda,
1/2 teaspoon salt,
120 g butter,
200 g sugar,
2 eggs,
200 g peeled and diced apples, cinnamon
Ingredients for the crust:
70 g brown sugar,
1 tablespoon plain flour,
pinch of cinnamon,
1 tablespoon butter,
Instructions:
Preheat oven to 180 ° C.
Or use Dutch Oven, 2 rings coals above, 6-9 coals down, in the summer less
Eggs, butter, sugar and vanilla sugar / flavor,  whisk it until Foamy.
Combine flour, baking powder, baking soda, salt. Stir in mixture.
Stir in apples and pour into muffin molds.
Sugar, cinnamon and flour, mixing. then add the butter and rub between your fingers until crumbs arise. Sprinkle muffin with it and then bake about 30 minutes.