Chocolate revel bars consist in two layers of oatmeal cookie dough sandwiching a layer of dark chocolate fudge. These sturdy bar cookies hold up well on the road, making them the perfect to-go snack.
In the bowl of a stand mixer using the paddle attachment, or in a large mixing bowl using a hand mixer, cream the butter and brown sugar together on medium speed until light and fluffy. Add remaining wet ingredients (egg and vanilla extract) and mix to combine. Sift the flour, baking soda and salt into the butter mixture and mix on low speed to combine. Stir in the oats. Set the buttery oat crumble mixture aside.
For the chocolate fudge layer:
In a microwave safe bowl, combine the condensed milk, chocolate chips, butter, and salt. Heat in 20-second increments until the chocolate is just melted. Stir to thoroughly combine. Add walnuts, if using.
Pat 2/3 of the oatmeal mixture into an even layer in the bottom of the prepared pan. Spread the chocolate mixture over the top of the oatmeal cookie layer. Dot the top of the chocolate filling with the remaining dough.
Bake 30 to 35 minutes in a preheated oven until the top is golden brown. Remove to a wire rack to fully cool, then cut into bars.
Notes
These chocolate oatmeal cookie bars keep very well in an airtight container for several days. Ours, however, have rarely been known to last several days!This recipe can also be doubled and made in a 9 x 13 inch pan.