how long do you cook summer squash
{{model.addEditText}} Print. 1  Prep. 2  Cook. 3  Ready In.  Preheat oven to 350 degrees F (175 degrees 1  C). Lay the summer squash slices in a single layer in a 9x12-inch baking dish; dot with butter.  Bake in the preheated oven until the squash is tender, bubbling, and golden yellow-brown, about 20 minutes.