how to get muffin tops like the coffee shops have

l kinda need some advice l love to make muffins and every time mine come out of the oven l can never get them to be like the tops that you buy at a coffee shop what am l doing wrong, mine seem to come out sticking on the top and they are cooked all the way through. l have even tried and put them on broil for a bit,so ever bit of advice is helpful