Step 1

Whisk together flour, buttermilk, sourdough starter discard, melted butter, eggs, sugar, and salt in a medium bowl until well combined. Cover and chill at least 8 hours or up to 18 hours.

Step 2

When ready to cook, preheat the oven to 200°F. Remove batter from refrigerator, and let stand at room temperature for 15 minutes. Meanwhile, preheat a Belgian or regular waffle maker, and lightly grease with cooking spray. Whisk baking soda into batter.

Step 3

Pour about 1/3 cup batter for each waffle into a Belgian or regular waffle maker. Cook according to manufacturer’s directions until waffles are golden brown and crisp, 3 to 5 minutes. Place on a baking sheet and keep warm in a 200°F oven for up to 30 minutes. Repeat with remaining batter.