Whisk eggs and buttermilk together in a large bowl. Then slowly add in the melted butter while whisking. Add in the brown sugar and whisk together.

In another bowl, whisk the flour, baking powder, and salt. Add the dry mixture to egg mixture and whisk just until smooth. Let batter rest briefly.

Heat a waffle iron and butter lightly or spray with nonstick cooking spray (even nonstick waffle irons require this step).

Scoop batter onto iron (about ¼ cup for an 8-inch round iron). Cook just until light golden brown. Serve immediately. Serves 8.