Coffee Chip Streusel Muffins

My mother came across coffee-flavored chocolate chips at the grocery store the other day. I had heard of cinnamon, mint, peanut butter, even raspberry flavored chocolate chips, but never coffee. But it makes sense, it is a popular flavor combination. So I researched some recipes online and decided to try this one. 

Coffee Chip Streusel Muffins
STREUSEL
1/4 cup all-purpose (plain) flour
3 Tablespoons packed brown sugar
1/4 teaspoon ground cinnamon
2 Tablespoons butter or hard margarine, melted
3 Tablespoons coffee-flavored chocolate chips 
MUFFINS
1 cup all-purpose (plain) flour
1/2 cup packed brown sugar
1/2 teaspoon baking soda
1/4 teaspoon salt
1/2 cup buttermilk
2 Tablespoons oil
2 teaspoons vanilla extract
1/2 cup coffee-flavored chips

Preheat oven to 375◦F. Grease or line muffin cups with paper liners.
STREUSEL: In a small bowl, mix the flour, brown sugar, and cinnamon. Drizzle in the butter, then stir in the chips.
MUFFINS: In a large bowl, mix the flour, brown sugar, soda, and salt. In a separate medium bowl, mix the milk, oil, and vanilla. Stir the liquid ingredients into the dry until just combined. Gently stir in the chips. Divide batter evenly among prepared muffin cups. Sprinkle with prepared streusel. Bake for about 20 minutes, until a toothpick inserted in the center comes out clean. 

“Coffee Streusel Mini Muffins.” http://www.hersheycanada.com/recipes/en/recipe-details.aspx?id=96327&name=Coffee-Streusel-Mini-Muffins. Hershey's Kitchens, n.d. Friday, September 13, 2013..