Mocha Crumble Bars

Directions

1. 1
   Preheat oven to 350°F Line a 15x10x1-inch baking pan with foil.
2. 2
   In a medium bowl, using an electric mixer set on high speed, beat butter and brown sugar until light and creamy.
3. 3
   On medium speed, beat in egg.
4. 4
   In another bowl, combine flour, baking soda and 1/2 teaspoon cinnamon.
5. 5
   Gradually add flour mixture to butter mixture and mix until dough is smooth. Stir in oats and walnuts.
6. 6
   Reserve 1 cup dough for topping. Press remaining dough into bottom of prepared pan.
7. 7
   In a medium saucepan, heat 1 1/2 cups chocolate chips, condensed milk, instant coffee and remaining cinnamon over medium heat; stir until smooth.
8. 8
   Spread mixture evenly over the dough in the pan, smoothing the surface with a spatula; crumble reserved dough on the top.
9. 9
   Sprinkle with the remaining chocolate chips. Bake until lightly browned, about 20 minutes. Cool completely on a wire rack. Lift foil to remove from pan; cut into 2-inch bars.