Preheat oven to 350°F. In large bowl, combine Packet 1 and butter. Mix with a fork until small crumbles form. Reserve 1 cup crumbles; press remaining into greased 8x8-inch baking pan.
In small microwave-safe bowl, combine Packet 2 and 2 tablespoons water. Microwave on HIGH 20-30 seconds. Pour over crust to within ½-1 inch from edges. Top with reserved crumbs; press lightly into filing. Bake 26-30 minutes. Bars will be soft and filling will be very hot.
Cool completely before serving. Makes 16 servings.
more ways to mix it up:
Add ½ cup chopped almonds to reserved crumbles; sprinkle over filling.
Stir ½ cup sweetened, flaked coconut into crumb mixture.
Drizzle melted chocolate over bars or top each bar with a chocolate-dipped pecan half.