In a large bowl, whisk together the flour, sugar, baking powder, cinnamon, salt and nutmeg. Set aside.
In a medium bowl, beat the eggs. Add the milk and vanilla extract and whisk to combine. Add the sourdough discard, orange zest, and melted butter. Stir until combined.
Pour the wet ingredients into the dry ingredients, and whisk until smooth.
Grease a skillet with butter or cooking spray and heat over medium-low heat*. Pour approximately ⅓ cup of batter into the center of the pan. Cook for 2-3 minutes until the pancake is bubbling, the edges are starting to set, and the bottom is lightly browned. Carefully flip the pancake and cook an additional 2-3 minutes until lightly browned on both sides. Transfer to a plate.
Repeat with remaining pancakes. Serve immediately with your favorite toppings!
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Notes
*Temperatures may vary based on your stovetop. I recommend cooking pancakes over either medium or medium-low heat. To make this recipe with active sourdough starter, replace the sourdough discard with active starter (200g). You do not need to change any other ingredients in the recipe.