Line a 13x9x2-inch baking pan with foil. Coat foil with cooking spray; set aside. In a large mixing bowl, combine the 2 1/2 cups flour and the powdered sugar. Using a pastry blender, cut in the 1 cup butter until mixture resembles coarse, dry crumbs. Press into bottom of prepared pan. Bake in a 375° F oven for 15 to 20 minutes or until crust begins to brown. Remove from oven.Advertisement
Meanwhile, in a medium saucepan melt the 6 tablespoons butter. Add cream. In a small bowl, combine the 1 cup granulated sugar and the 2 tablespoons flour. Add sugar mixture to the saucepan, stirring to combine. Bring mixture to boiling over medium-high heat, stirring frequently. Reduce heat to medium and boil for 3 minutes, stirring constantly.
Remove pan from heat. Stir in sliced almonds and almond extract. Spread over warm crust. Bake for 8 to 10 minutes or until almond layer begins to bubble and look golden. Place pan on a wire rack and cool completely.
To serve, use foil to lift bars from pan. Use a greased sharp knife to cut bars into diamond shapes. Just before serving, drizzle bars with caramel topping.
Place bars (without caramel topping) in a single layer in an airtight container; cover. Store at room temperature for up to 2 days or freeze for up to 3 months. Drizzle with caramel topping just before serving.