Chocolate Lover's Chocolate Chocolate-Chip Muffins with Nutella

INGREDIENTS

1 3/4 cups

all-purpose flour

1 1/4 cups

light brown sugar, packed

2/3 cup

unsweetened natural cocoa powder

1 tsp

instant espresso powder/granules, optional

1 tsp

baking powder

1 tsp

baking soda

salt, optional and to taste

1 cup

semi-sweet chocolate chips

3/4 cup

buttermilk

large eggs

1/3 cup

canola or vegetable oil

1 tbsp

brewed coffee, optional (leftover from the morning brew is fine)

2 tsp

vanilla extract