Chewy Chocolate Revel Bars are a nostalgic favorite with oatmeal cookie layers filled with rich chocolate fudge. Decadent, easy cookie bar recipe, perfect for holidays, gifting, or freezer treats for last-minute chocolate cravings.
Preheat the oven to 350 degrees. Line a 9 x 13 pan with parchment paper, leaving an overhang for easy removal.
In a large mixing bowl, cream the butter, brown sugar, and baking soda. Beat in eggs and vanilla until well combined. Mix in the flour until just combined. Add the oats and mix on low speed until incorporated into the dough. The mixture will be very thick.
Press ⅔ of the oat mixture into the pan.
Place the butter, chocolate chips, and condensed milk into a medium saucepan over low heat. Warm until melted. Remove from heat and stir in the vanilla. If using nuts, stir them in now.
Pour the chocolate over the oat mixture and spread in an even layer. Flatten the remaining oatmeal cookie dough into small discs and arrange them on top of the chocolate mixture.
Bake for 25 minutes until the oatmeal topping is lightly browned. The chocolate filling will look moist. Cool bars in the pan. Chill at least 3 hours until firm. Cut into bars.
Notes
Chill the bars at least 3 hours for clean, neat slices.
Lightly wet your fingers to press the oatmeal mixture into the pan and form the discs without sticking.
Use parchment or aluminum foil with an overhang for easy lifting and cutting.
Do not overbake; the filling should look glossy and moist when done.
For thicker bars, bake in a 9 x 9 pan and add a few extra minutes.