Double Chocolate Muffins

2 ounces unsweetened chocolate
1 3/4 cups all-purpose flour
1 teaspoon baking soda
1/4 teaspoon salt
1 cup buttermilk
1 teaspoon vanilla
8 tablespoons unsalted butter (no substitutions)
1 cup packed light brown sugar
1 large egg
1 cup semisweet chocolate chips

Let all ingredients come to room temperature. Preheat oven to 350*F. Grease muffin cups or line with paper/foil cups. Melt unsweetened chocolate and let cool.

Whisk together flour, baking soda, and salt. In another bowl, combine buttermilk and vanilla. In a large bowl, beat butter until creamy, about 30 seconds. Gradually add brown sugar, beating on high speed until lightened in color and texture, about 4 to 5 minutes. Beat in egg. Add melted chocolate and beat in until just blended.

Add 1/3 of the flour mixture and beat in thoroughly, then 1/2 of buttermilk mixture and beat in. Continue until all of flour mixture and buttermilk mixture have been fully incorporated. Stir in chocolate chips.

Divide batter among muffin cups and bake 25-30 minutes, until toothpick inserted into one or two of the muffins comes out clean. Let cool for 2 to 3 minutes in the pan before removing; serve at room temperature.