Mini Peanut Butter Chocolate Cheesecakes

Preheat the oven to 325 degrees F (165 degrees C). Line a 12-cup muffin tin with paper liners.

Mix graham cracker crumbs, butter, and brown sugar together in a bowl. Spoon evenly into the prepared muffin cups and press to flatten.

Beat cream cheese in a mixing bowl with an electric mixer until smooth and creamy. Mix in white sugar and vanilla until fluffy. Mix in milk, then eggs, one at a time; mix until smooth. Transfer 1/2 of the batter to a separate bowl.

Add peanut butter to one bowl of the cream cheese mixture; beat until well blended. Divide mixture among the muffin cups.

Add melted chocolate chips to the remaining cream cheese mixture and beat until creamy and smooth. Pour into the muffin cups and sprinkle chopped peanuts over top.

Bake in the preheated oven until almost set, 20 to 25 minutes. Remove from the oven and place on a wire rack until completely cooled. Enjoy immediately or refrigerate before serving.