Prepare the Ingredients: Gather all your ingredients and have them measured out and ready to go.
Mix Dry Ingredients: In a large mixing bowl, combine flour, sugar, baking powder, baking soda, and salt. Mix well.
Combine Wet Ingredients: In a separate bowl, whisk together sourdough discard, milk, and eggs until fully combined.
Mix Wet and Dry Ingredients: Pour the wet ingredients into the bowl with the dry ingredients. Gently mix until just combined. Be careful not to overmix; it's okay if there are a few lumps.
Preheat the Skillet: Heat a skillet or griddle over medium heat. Lightly grease with butter or cooking spray.
Cook the Pancakes: Pour about 1/4 -1/2 cup of batter onto the skillet for each pancake. Cook until bubbles form on the surface and the edges look set, about 2-3 minutes.
Flip the pancakes and cook for an additional 2-3 minutes until golden brown and cooked through.
Keep Warm: Transfer the cooked pancakes to a plate and keep warm. Repeat the cooking process with the remaining batter, greasing the skillet as needed.
Serve the pancakes warm with your favorite toppings such as maple syrup, fresh berries, or peanut butter.