- 4 (1 ounce) squares unsweetened chocolate
- 1/2 cup butter
- 3/4 cup packed brown sugar
- 3/4 cup white sugar
- 2 eggs
- 4 tablespoons brandy-based orange liqueur (such as Grand Marnier®)
- 1 teaspoon vanilla extract
- 1 teaspoon orange zest
- 3/4 cup all-purpose flour
- 1/8 teaspoon salt
- 1/2 cup semisweet chocolate chips
- Preheat oven to 350 degrees F (175 degrees C). Grease and flour an 8 inch square baking pan.
- Over low heat, melt chocolate and butter in a medium saucepan. Stir until smooth. Remove from heat and cool slightly.
- In a large bowl, beat sugars and eggs until light and fluffy (about 2 minutes with electric mixer). Add melted chocolate, 3 tablespoons of the Grand Marnier, vanilla and the orange peel, mixing until well blended. Mix in the flour, salt and chocolate chips (on low speed if using an electric mixer).
- Pour batter into prepared pan. Smooth the top. Bake for 30-35 until sides look done and top feels firm. Inserting a toothpick 2 inches from center should come out clean; however, center will jiggle and look undercooked.
- Remove from oven and brush top with the remaining 1 tablespoon Grand Marnier. Cover pan with foil or plastic and cool completely. Cut into 2 inch squares. Store covered at room temperature or they may be frozen. Defrost covered at room temperature.