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Stream in the butter while pulsing.
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Press this into the bottom of a 9-inch pie plate.
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Make sure to really pack in the crumbs, I like to use the bottom of a flat measuring cup to do this.
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Place the pie plate into the freezer for 30 minutes.
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Place the heavy cream in a large bowl and whip to stiff peaks, set aside.
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Place the cream cheese into a large bowl and whip with an electric hand mixer until smooth.
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Add the powdered sugar a little at a time until mixed in.
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Add the peanut butter and vanilla, mix to combine.
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Fold in the whipped cream until there are no streaks left.