Preheat the oven to 350°F then spray the 8x8 inch baking pan with non stick cooking spray
Line the pan with parchment paper. Cut all four corners of the parchment paper so it lies flat in the pan then spray the parchment paper with non stick cooking spray
Add the melted butter to your large mixing bowl and mix in the brown sugar until fully incorporated
Mix in the eggs one at a time, scraping down the sides between each addition
Stir in the vanilla
Mixing the Dry Ingredients
Whisk the dry ingredients together in a medium bowl
Add the dry ingredients to the wet ingredients and fold together until almost full combined
Making the Vanilla Brownies
Scoop half of the vanilla brownie batter into the prepared pan and spread into an even layer
Layer the Oreos on top evenly
Spread the other half of the batter evenly over the top of the Oreos
Bake for 35-40 minutes
Allow to cool on a wire rack
Making the White Chocolate Drizzle
While the vanilla brownies are cooling melt the white chocolate
Place the white chocolate in a heat proof bowl and melt it using a double boiler
Pour the white chocolate into a bowl or jar and let it cool for 5-10 minutes
Using a pastry bag or a zip lock bag with the corner cut off, drizzle the white chocolate over the top of the brownies then let it set
Cut and enjoy!
Notes
Lining the pan with parchment paper allows for easy removal of brownies and easier cutting.Allow eggs to come to room temperature before mixing.Don't overmix brownie batter once you've added the dry ingredients. Allow vanilla brownies to cool before slicing.