Preheat oven to 350°F. In large bowl, combine Blackberry Crumble Bar Mix 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 medium bowl, combine Blackberry Crumble Bar Mix packet 2 and water; stir until smooth. Pour over crust to within 1 inch from edges. Top with reserved crumbs. Bake 26-30 minutes. Bars will be soft and filling will be very hot.
Cool completely before serving.
Makes about 19 servings.
More Ways to Mix it Up!
For a cheesecake version, prepare packet 1 as directed in a greased 8x8-inch baking pan. Microwave 8 ounces cream cheese 45 seconds. Vigorously stir until smooth. Stir in packet 2 and 1 large egg until well combined. Spread over crust and top with remaining crumble. Bake as directed. Cool completely. Keep refrigerated.
Stir ½ cup chopped pecans or macadamia nuts into reserved crumble topping.
Stir ½ cup shredded coconut in with packet 1.
Drizzle melted chocolate over bars or top each bar with a chocolate-dipped pecan half.