1/2 cup finely chopped peanut butter cups mixed with 1 tbsp flour (the candy tends to sink at the bottom if you don't mix it with a little bit of flour)
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1/2 cup soft butter
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1 cup creamy peanut butter
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2 cups (240 grams) powder sugar
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1/3 to 1/2 cup heavy cream (depending on your peanut butter thickness)