Nutella-Stuffed Cinnamon Sugar Muffins

INGREDIENTS

1/3 cup

or 75g) unsalted butter, softened to room temperature

1/2 cup

granulated sugar

large egg

1 tsp

vanilla extract

1/2 cup

milk

and 1/2 cups (190g) white whole wheat flour flour (spoon & leveled)

and 1/2 teaspoons baking powder

1/2 tsp

ground cinnamon

1/4 tsp

ground nutmeg

1/2 tsp

salt

heaping teaspoons Nutella

1/4 cup

granulated sugar

2 tsp

cinnamon

3 tbsp

unsalted butter