Ingredients
1 teaspoon plus 3/4 cup butter, divided3 ounces unsweetened chocolate, chopped3 large eggs, room temperature1-1/2 cups packed brown sugar2 teaspoons vanilla extract3/4 cup all-purpose flour1/4 teaspoon baking sodaCARAMEL LAYER:3/4 cup sugar3 tablespoons water1/4 cup heavy whipping cream2 tablespoons butterTOPPING:1-1/2 cups semisweet chocolate chips1 cup milk chocolate chips1 jar (3-1/2 ounces) macadamia nuts, coarsely chopped
Preparation
Line a 9-in. square baking pan with foil; grease the foil with 1 teaspoon butter and set aside. In a microwave-safe bowl, melt chocolate and remaining butter; stir until smooth. Cool for 10 minutes. In a large bowl, beat eggs and brown sugar until blended; beat in chocolate mixture and vanilla. Combine flour and baking soda; gradually add to chocolate mixture.
Pour into prepared pan. Bake at 325° for 40 minutes or until a toothpick inserted in the center comes out with moist crumbs (do not overbake). Cool on a wire rack.
In a large heavy saucepan, combine sugar and water. Cook and stir over medium heat for 4-5 minutes or until sugar is dissolved. Cook over medium-high heat without stirring until syrup is golden, about 5 minutes; remove from the heat.
In a small saucepan, heat cream over low heat until small bubbles form around edge of pan. Gradually stir cream into syrup (mixture will boil up). Cook and stir over low heat until blended. Stir in butter until melted. Remove from the heat; cool slightly.
Pour over brownies to within 1/4 in. of edges. Sprinkle with chips and nuts. Bake at 325° for 5 minutes (do not let chips melt completely). Cool completely on a wire rack. Refrigerate for 4 hours. Lift out of the pan; remove foil. Cut into bars.
