Lid definitely. I put it on high with about an 1/8 of a cup of veg oil in the bottom. Let the oil feather and get hot. Dump in my kernels and coat with the oil. Put the lid on and let it pop for about two or three minutes. Then turn the heat down low for it to finish so you don't burn any kernels. We like nutritional yeast too or brown butter and 3 parts sugar to 1 part salt.