Banana Chocolate-Chunk Espresso Muffins

INGREDIENTS

1 cup

unbleached all-purpose flour

1/2 cup

whole wheat flour (I use and recommend King Arthur)

and 1/2 teaspoons instant espresso powder (such as Medalgia d’Oro)

1 tsp

kosher sea salt

1 tsp

baking soda

1/4 tsp

baking powder

1/2 tsp

ground cinnamon

1/4 tsp

ground allspice

6 tbsp

unsalted butter, softened

3/4 cup

granulated sugar

whole large eggs

1 tsp

pure vanilla extract

1 cup

mashed very ripe banana (about 4 dead bananas)

1/3 cup

low-fat or whole milk

3 oz

chopped semisweet chocolate

demerara sugar, for sprinkling