How to Store ChocolateRevelBars. Refrigerate cooled bars in an airtight container (stacked between layers of parchment paper) for up to five days. These chocolaterevelbars are chewy oatmeal bars filled with a sweet chocolate fudge. A family-favorite dessert that's easy to make and delicious to eat! Old Fashioned ChocolateRevelBars have a rich chocolate fudge layer sandwiched between two buttery oatmeal cookie layers. Jump to Recipe. Prep Time 20 minutes mins. How to make chocolaterevelbars. Using a stand mixer, beat together ¾ cup butter and brown sugar until creamy. Add the egg, yolk, and 1 ½ teaspoons vanilla and beat again. Indulge in the decadence of ChocolateRevelBars, a timeless dessert that combines rich, gooey chocolate with the comforting chew of oatmeal. How To Make chocolaterevelbars. Step 1. Preheat oven to 350 degrees F. Lightly grease a 9x13 inch baking pan. A revelbar is a thick dessert bar made with what is essentially oatmeal cookie bar layers and a gooey, fudgy layer in the middle. They are most commonly made with a chocolate fudge layer... Bake, enjoy, repeat. We'll be making these REESE'S Peanut Butter-ChocolateRevelBars for family, friends and ourselves year-round—they're just that good. Chewy chocolaterevelbars are chewy oatmeal cookie bars, cut into diamond shapes, with a thick ribbon of chocolate fudge through the middle. Chocolate Fudge RevelBars. Starbucks Oat Fudge Bar Recipe. Brownie Bottom Bars Recipe Allrecipes.