Black-Bottom Peanut Butter Mousse Pie Ingredients Nonstick vegetable oil spray 7 whole graham crackers, coarsely broken 1/4 cup (1/2 stick) unsalted butter, melted 4 tablespoons sugar, divided 1 1/3 cups bittersweet or semisweet chocolate chips (about 8 ounces) 2/3 cup plus 1 3/4 cups chilled whipping cream, divided 2 tablespoons light corn syrup 2