Follow these steps to bring these delicious bars to life:

1. Preheat your oven to 350°F (175°C) and lightly grease a 9×13 inch baking dish.
2. In a saucepan over medium heat, melt 1/2 cup of the butter until it turns a rich golden brown. This will take about 5 minutes. Let it cool slightly.
3. In a large bowl, cream together the remaining 1/2 cup butter and brown sugar until light and fluffy, about 3 minutes. Stir in eggs one at a time, followed by the vanilla extract.
4. Add the browned butter to the mixture and combine well.
5. In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add this to the wet ingredients, mixing until just combined.
6. Fold in the oats and chocolate chips until evenly distributed.
7. Spread the batter into the prepared baking dish and smooth the top with a spatula.
8. Bake for 25-30 minutes, or until the edges are golden and a toothpick inserted into the center comes out clean.
9. While the bars are cooling, prepare the frosting by heating the heavy cream in a saucepan over medium heat until it simmers.
10. Remove from heat and whisk in the powdered sugar until smooth. Drizzle over the cooled bars and allow to set before slicing.

These steps are designed to be as straightforward as possible, making the cooking process both enjoyable and rewarding. Remember, patience is key when browning the butter—it’s worth the wait!