Preheat the oven to 450°F and line a half sheet pan with parchment paper. Spray the parchment with cooking spray and set the pan aside.
In a large bowl, whisk together the flour, baking powder and soda, and salt.
In a medium bowl, whisk together the sugar, oil, eggs, yogurt, and milk.
Add the wet ingredients into the dry ingredients and whisk together until just combined. A few lumps in the batter are fine, you don't want to over mix.
Pour the batter over the prepared sheet pan and smooth the batter out in an even layer.
In a small bowl, combine the melted butter, brown sugar, and pecans plus the cinnamon (if desired). Spoon out lines of the pecan filling over the pancake batter.
Use a knife to drag the pecan filling through the pancake batter, going in the opposite direction of the lines of pecan filling.
Bake the pancakes for 14-17 minutes, until the batter is set and the pancakes are golden.
Slice into 24 squares and serve as-is or with additional butter, powdered sugar, or maple syrup.
Nutrition facts are sometimes provided below and are calculated using an online calculator. With specific brands of ingredients and additions, omissions, or substitutions the nutrition facts may change. We encourage you to use your own nutrition facts caculator to obtain the most accurate nutrition facts for your meal.