Grasshopper Squares

Ingredients

• 1 offset spatula
• ¾ cup unsalted butter
• ¾ cup all-purpose flour
• 10 ½ ounces fine-quality bittersweet chocolate (not extra-bitter or unsweetened and no more than 60% cacao)
• 1 ½ cups light brown sugar
• 3 large eggs
• 1 ¼ teaspoons vanilla
• + 8 more ingredients
• • 6 tablespoons unsweetened Dutch-process cocoa powder
  • 1 teaspoon peppermint extract
  • 1 cup heavy cream
  • 10 ounces fine-quality bittersweet chocolate (not unsweetened)
  • ¾ teaspoon salt
  • ½ cup heavy cream
  • 10 ounces fine-quality white chocolate
  • 2 tablespoons green crème de menthe

Put oven rack in middle position and preheat oven to 375°F. Lightly butter a 13- by 9-inch baking pan and line with 2 crisscrossed sheets of foil, leaving a 2 inch overhang on all sides. Butter foil. Melt butter and chocolate with brown sugar in a 3-quart heavy saucepan over moderate heat, stirri...

View full recipe at Epicurious