Adapted from GillyCakes
2 1/4 cups flour
1 teaspoon baking soda
1/2 teaspoon salt
1/2 cup butter, melted, cooled slightly
1 cup brown sugar
1/4 cup sugar
1 1/2 teaspoons vanilla
1 cup chopped Butterfinger candy bars (I used two 2.1 ounce bars)
Preheat oven to 325º. Line baking sheets with parchment.
Combine melted butter with sugars, and beat till creamy. Mix in eggs and vanilla. Add soda and salt and mix well, then add flour and mix till combined. Gently add chopped Butterfingers.
Scoop tablespoonfuls of dough out onto baking sheets. Bake 8-10 minutes or till lightly browned. Cool for a couple minutes on baking sheet, then remove to rack to finish cooling. Makes about 3 dozen.