Thick, chewy oatmeal cookie bars with a rich ribbon of chocolate fudge baked through the center—perfect for potlucks, holidays, or when you want a seriously satisfying dessert bar.
Do not overbake—remove the bars when the top is just lightly golden; the center will firm as it cools. Use real butter for best flavor and texture. For slightly less sweetness, you can reduce the brown sugar in the oat mixture to 1 3/4 cups. These bars are excellent make-ahead: they taste even better on day two, keep 3 days at cool room temperature or about a week in the fridge, and freeze well for 2–3 months when layered with parchment in an airtight container.
Keyword Bar Cookies, Chocolate Oat Bars, Fudge Revel Bars, Make-Ahead Dessert, Oatmeal Bars, Potluck dessert