Chocolate Crumb Cake Bars

Although I am not usually one to use a cake mix, I broke down and used one for this recipe. We always seem to have a cake mix lying around the house anyway, it's one of those, it's on sale so I'll buy it things. The cake mix will probably never get used for an actual cake, since I insist on making them from scratch, so I decided to use it in this recipe. It is difficult to use a homemade dry cake mix for this recipe, since you are not actually making a cake with it, and crucial ingredients will be missing. The cake mix worked well in these squares, which are rich, very chocolatey, and delicious! They are also incredibly quick and easy to make and serve.

Chocolate Crumb Cake Bars
1 can (300 mL or 11 ounces) sweetened condensed milk
1 cup semi-sweet chocolate chips
1 teaspoon vanilla extract
1 box Devil's food cake mix, 2 layer size
1 large egg, beaten
1/4 cup cooking oil

Preheat oven to 350◦F. Line a 9x13 inch rectangular baking pan with parchment paper.
In a small saucepan, heat the milk, chocolate chips, and vanilla over medium heat, stirring until melted and smooth.
In a large bowl, crumble the cake mix, egg, and oil together. Reserve about 3/4 cup for the topping. Press remaining mixture into prepared pan.
Pour milk mixture evenly over crust in pan. Scatter reserved crumbs over top. Bake for about 25 minutes.