To make these Breakfast Muffins gluten-free the main focus should be, on the hash browns. Store-bought shredded hash browns often contain flour or preservatives that aren't suitable, for those avoiding gluten. To tackle this you have two options;. Search for a brand explicitly labeled as gluten-free or take it a step further and prepare your shredded potatoes at home. It's actually quite simple. Guarantees that you're using unadulterated potatoes. Just wash, peel and grate your potatoes before following the rest of the recipe as instructed.