Preheat oven to 300 F /148 C and prepared a baking sheet by lining it with parchment paper.
Place 22 crackers on the parchment paper, bottom side facing up.
Place a reese's mini peanut butter cup onto the centre of each cracker.
Place in oven for 5-6 minutes until the reese's mini peanut butter cups have softened.
Remove from oven. Working quickly, cover each mini peanut butter cup with the second cracker and press gently until the the mini butter cup goes just to the edges. Place in fridge for about 15 minutes as this will help with the chocolate dipping process.
While the ritz crackers are cooling, melt the chocolate and butter in a microwave safe bowl at 5 second intervals. After every 5 seconds remove the bowl from the microwave and stir. Repeat until the chocolate has completely melted.
Remove the stuffed crackers from the refrigerator and using a fork dip each stuffed cracker into the melted chocolate and cover it completely. Place back on to the parchment paper.