Dark Chocolate Chunk Raspberry Crumb Muffins

Mmm... these Dark Chocolate Chunk Raspberry Crumb Muffins are so easy and delicious! Perfect for breakfast or brunch.
Dark Chocolate Chunk Raspberry Crumb Muffins

Ingredients
Vegetarian
∙ Makes 1 dozen
Produce
1 1/2 cups Raspberries, fresh or frozen
1 tsp Zest, orange
Refrigerated
2 Eggs plus 1 egg yolk, large
Baking & Spices
3 tsp Baking powder
1/4 cup Brown sugar, light packed
1/2 tsp Cinnamon, ground
8 oz Dark chocolate
3 1/2 cup Flour
1 1/4 cup Granulated sugar
1/4 tsp Nutmeg, ground
5/8 tsp Salt
1 1/2 tsp Vanilla extract
Dairy
3/4 cup Butter, unsalted
1 cup Whole milk, full-fat