
For the overnight sponge:
2 cups all-purpose flour
2 Tbs sugar
2 cups buttermilk
1 cup sourdough starter, straight from the refrigerator (not fed)**
For the waffles:
2 large eggs
¼ cup oil
All of the overnight sponge
2 Tbs sugar
¾ tsp salt
1 tsp baking soda
To make the overnight sponge, combine the flour, sugar, buttermilk and sourdough starter in a large mixing bowl. Mix well to blend. Cover and let rest overnight at room temperature.
When you are ready to make the waffles, preheat a waffle iron according to the manufacturer’s instructions. In a small bowl or liquid measuring cup, combine the eggs and oil. Add to the overnight sponge.** Mix in the sugar, salt and baking soda, stirring well to combine. The batter will bubble.
Pour the batter into the preheated waffle iron and bake according to the manufacturer’s instructions. Use slightly less batter than usual (I use a very scant ½ cup batter in each section of my waffle maker), as the batter will continue to rise and spread in the waffle maker.
Remove waffles from waffle maker and place on a wire rack (not a plate). Serve immediately or keep warm in a warm oven (very low heat).
**SOURDOUGH STARTER NOTE: Sourdough starters can have different thicknesses (hydration). After adding eggs in the morning, if the batter is too thick to scoop with a ladle or measuring cup, add a little bit more buttermilk. The batter will have a different consistency than normal waffle batters: it should be like a thin bread dough, be thin enough to scoop, but not thin enough to pour.
Makes about 4 ½ large Belgian waffles (18 small squares)
To freeze: Cool waffles on a wire rack. Place in Ziploc bags and freeze. Reheat individual frozen waffles in a toaster (for crispier edges) or microwave (for a soft waffle).
Recipe adapted from King Arthur Flour and Annie’s Eats
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