01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with paper liners or grease thoroughly with cooking spray.
02 - In a medium bowl, melt the butter. Whisk in granulated sugar and brown sugar until glossy and well combined. Add eggs and vanilla, mixing thoroughly.
03 - Sift cocoa powder, flour, and salt into the butter mixture. Stir gently until just combined—do not overmix to maintain fudgy texture.
04 - Divide brownie batter evenly among the prepared muffin cups, using about 1 heaping tablespoon per cup.
05 - In a separate bowl, beat softened cream cheese until smooth and creamy. Add sugar, egg, and vanilla, beating until completely lump-free.
06 - Spoon approximately 1 tablespoon of cheesecake mixture over each brownie base. Gently smooth tops with the back of a spoon.
07 - Sprinkle each cup generously with loaded toppings—chocolate chips, nuts, crushed Oreos, and mini M&Ms. Press lightly to adhere.
08 - Bake for 22 to 25 minutes until cheesecake is set and brownie edges feel firm to the touch. Centers should still be slightly moist.
09 - Let cool in the pan for 10 minutes before transferring to a wire rack. Refrigerate for at least 1 hour before serving for optimal texture and flavor.