In a large bowl, mix the flour, baking powder, baking soda, sugar, cinnamon, and salt. Set aside.
210 grams all-purpose flour, 6 grams baking powder, 6 grams baking soda, 50 grams white sugar, 2 grams ground cinnamon, 6 grams salt
In a medium bowl, whisk together the eggs, milk, sourdough discard, and 4 Tablespoons of melted butter until smooth.
2 large eggs, room temperature, 240 grams milk, 280 grams sourdough discard, 57 grams unsalted butter, melted
Pour the wet ingredients into the dry ingredients. Mix until just combined, it's okay if it is still lumpy.
Peel and dice the Granny Smith apples, about the size of a corn kernel.
Heat a cast-iron skillet or frying pan to medium-high heat. Melt a tablespoon of butter and add in the diced apples. Saute for 5-7 minutes, or until just tender.
2 Granny Smith apples, 14 grams unsalted butter, for apples
Remove the apple pieces from the hot pan and then fold them into the pancake mixture.To save time, prepare the apples in advance! Cover and store in the fridge until ready to add to the batter. With a measuring cup, pour about 1/3 cup of pancake batter into the hot cast iron pan for each pancake. Cook on the first side for about 2-3 minutes, or until the edges of the pancakes are golden brown and bubbles start appearing on the top of the pancake. Flip and cook the Sourdough Apple Pancakes for 2-3 minutes on the other side.I found that I got more of an even brown color without buttering the hot pan before cooking the pancakes. However, you can grease the hot pan with butter before cooking if you prefer a more buttery flavor on your pancakes. Repeat with the remaining batter.
Serve warm with your favorite toppings and enjoy!