Proof the yeast: In a bowl add warm milk (about 110-115 degrees F), add yeast and sprinkle sugar. Set aside until it foams up.
In a large bowl, whisk together the flour, brown sugar, and salt (if you’re using unsalted butter).
Without over mixing the ingredients, whisk the wet and dry ingredients together; the flour mixture, yeast, and the buttermilk mixture together. You can mix the yeast and the butter mixture together before adding to the dry ingredients
After the waffle maker is hot spray with cooking spray/oil/butter.
Add the batter (don’t overfill) and cook according to the waffle maker recommended time.