In a large mixing bowl, whisk 1 1/2 cups flour, 3 Tablespoons sugar, 1 teaspoon baking powder, 1 teaspoon baking soda, and 3/4 teaspoon salt until combined. Add 1 cup buttermilk (see notes), 1/2 cup sourdough discard, 1/3 cup yogurt, 2 eggs, 4 Tablespoons melted butter, and 1 teaspoon vanilla. Mix gently until combined. The batter should be smooth, but some small lumps are okay. Let the batter sit for 10 minutes.
Preheat waffle maker to medium heat, or desired level.
Pour 1/3 cup of batter into the waffle maker. Cook 2-3 minutes, or until golden.
Repeat the process with remaining batter. You can keep the waffles warm in the oven on a cookie sheet at 175°F while cooking the rest of the pancakes. Serve with maple syrup and fresh berries.
Notes
Buttermilk: Make your own by mixing 1 cup of milk with 1 Tablespoon of lemon juice or white vinegar. Overnight Preparation:
Whisk together all wet and dry ingredients together EXCEPT the baking powder, baking soda, salt and eggs. The batter will be thicker, so I recommend adding 2 extra Tablespoons milk. Cover and let sit at room temperature overnight. The next day, add remaining ingredients. If the mixture is too thick, add another 1-2 Tablespoons milk. Let the batter sit at room temperature for about 10 minutes until bubbly.
Weighed Ingredients: Using a scale and weighing your ingredients will give you more consistent results.Storage: Store leftover waffles in an airtight container in the fridge for up to 1 week or freeze for up to 3 months. Toast straight from the freezer or warm in the microwave for a softer waffle.