After eight months eating my way through a pandemic, my baking cupboard is a little disordered with a little bit of this and a little bit of that leftover from previous recipes. In a quest to leave no sweet behind, I made these Kitchen Sink Brownies. So the most important thing to remember about these brownies is that you don't have to be married to the ingredients listed in the recipe. If you don't have walnuts, use pecans or peanuts. If you're 1/2 cup short on semi-sweet chocolate chips, …