Using a food processor, or a large ziplock bag and rolling pin, blend Oreos until small and medium in size. To make the Oreo sugar, blend together 2 tablespoons of granulated sugar with 2 Oreo cookies until it resembles coarse crumbs. Set aside.
1 ½ cups Chopped Oreo pieces, 2 tablespoons (24g) Granulated sugar, 2 tablespoons Oreo cookie crumbs
In a large mixing bowl, sift the cake flour. Add the granulated sugar, baking powder, baking soda, and kosher salt, and whisk together until combined. Set aside.
2 ½ cups (312g) Cake flour, 1 cup (200g) Granulated sugar, 2 ½ teaspoons Baking powder, ½ teaspoon Baking soda, ½ teaspoon Kosher salt
In a medium bowl, whisk together the eggs and sour cream until smooth. Then mix in the vanilla extract, melted butter, oil, and buttermilk.
2 large Eggs, ¼ cup (60g) Sour cream, 1 tablespoon Pure vanilla extract, ¼ cup (57g) Unsalted butter, ¼ cup (56g) Vegetable oil, 1 cup (240g) Buttermilk
Pour the wet ingredients into the dry ingredients and mix using a rubber spatula until only a few streaks of flour remain. Add the chopped Oreo cookie pieces and mix until just combined.
1 ½ cups Chopped Oreo pieces
Cover the bowl with plastic wrap and and allow the batter to rest for 1 hour. After 1 hour, preheat the oven to 425F. Line a cupcake or muffin pan with 6 paper liners, placing each liner in every other cup. For this method, you will bake the muffins in two batches. Be sure to cover the batter while the first batch bakes. Alternatively, you can bake all 11 at one time but your muffins won't be as tall.
Using an ice cream scoop, gently scoop the fluffy muffin batter into the paper liners, taking extra care not to deflate the batter. Overfill each liner to the top.
Top each muffin with a sprinkle of Oreo sugar and extra Oreo pieces.
Bake at 425F for 5 minutes. Then, (without opening the oven door), lower the oven temperature to 375F and bake for an additional 15 minutes.
Let the muffins rest in the pan on a wire rack for 10 minutes, then transfer to a cooling rack to cool completely. Allow muffins to cool for an additional 10 mintutes. Enjoy!!
Note: If baking muffins in two batches, be sure to increase the oven temperature to 425F once the first batch of muffins are done baking. While the first batch of muffins are baking, over the remaining batter with the plastic wrap until you are ready to bake the second batch.