There are a few tricks to making clean cuts in gooey, delicious strawberry brownies. First, line the pan with parchment paper so you can lift the whole slab of brownies out of the pan and cut them on a cutting board. It's easier than cutting them in a pan. Next, chill the strawberry brownies in the refrigerator for a few hours until they are very cold for nice clean cuts. Finally, use a warm knife and wipe it clean between cuts.