1-How to Prepare the Perfect Iced Oatmeal Cookie Bars: Step-by-Step Guide: Getting these iced oatmeal cookie bars just right starts with a few simple steps that anyone can follow, even if you’re new to baking. Begin by preheating your oven to 350°F and lining an 8 x 8 inch baking pan with parchment paper for easy removal later. This preparation helps ensure your bars come out with that perfect golden edge.

2-Next, melt the 1/2 cup unsalted butter and let it cool slightly, then pulse the 1 cup old fashioned oats in a food processor until they’re in smaller bits but not turned into flour. In a separate bowl, whisk together the pulsed oats, 1 cup plus 2 tablespoons all-purpose flour, 1 teaspoon baking soda, 1 teaspoon cinnamon, and 1/2 teaspoon salt to combine the dry ingredients.

3-Whisk the melted butter with 1/2 cup granulated sugar and 1/2 cup light brown sugar for about one minute until it looks like wet sand. Add the 1 large egg, 1 teaspoon vanilla, and 1 tablespoon molasses or honey, mixing well to incorporate. Fold in the dry ingredients until just mixed, then spread the dough evenly in the pan and bake for 20 to 24 minutes until the edges are set and golden.

4-After baking, let the bars cool completely in the pan on a wire rack for 1 to 2 hours. For the icing, whisk 1/2 cup powdered sugar, 1 to 2 tablespoons whole milk, and 1/4 teaspoon vanilla until smooth, adding more powdered sugar if needed. Spread the icing over the cooled bars and let it set before slicing. If you enjoy oatmeal-based treats, you might also like our recipe for baked oatmeal cups, which offers a similar hearty base with fun variations.