Line an 8x8 pan with parchment paper. Set aside.
Place the peanut butter chips in a medium microwave-safe bowl. Microwave on high for ~2 minutes, pausing every 30 seconds to stir the chips so they don’t burn.
Take the top and foil off the can of frosting and microwave on high for 1 minute.
Using a rubber spatula, remove the frosting from the container and add it into the bowl with the melted peanut butter chips.
Stir well to combine all ingredients.
Pour the mixture into the prepared pan and spread even, tapping the pan on the counter to flatten.
Place in the fridge for 4 hours or until set.
Using a sharp knife, slice the fudge into 1-inch pieces and enjoy!