Step 1

In a microwave, melt unsweetened chocolate; stir until smooth. Cool.

Step 2

In a large bowl, cream butter and sugars until light and fluffy, 5-7 minutes. Beat in the egg, food coloring and vanilla. Add cooled chocolate; beat until blended. In another bowl, mix the flour, baking soda and salt; add to creamed mixture alternately with sour cream, beating well after each addition. Stir in chocolate chips.

Step 3

Drop by tablespoonfuls 2 in. apart onto parchment-lined baking sheets. Bake at 375° for 6-9 minutes or until set. Remove to wire racks to cool completely. Spread with frosting. If desired, decorate with sprinkles.