I found this recipe that requires thick cheese sauce the reviews was good but her mac & cheese was light and I was wondering will I be able to cook my mac & cheese until it browns or if I'm able to brown thick cheese sauce
I've made many varieties of mac and cheese, both thick and thin so I'm confident in saying that browning is a matter of preference. There's no reason you can't brown the top more if you like. Use a higher oven temperature or you can put finish it under a grill/broiler to give it more color. I find a layer of breadcrumbs mixed with cheese browns well on mac and cheese.