I’ve been making this recipe for years and people lose their mind over them every time.

Quantity
High-quality dark chocolate, chopped 12 ounces
Instructions:

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Make peanut butter filling: Combine peanut butter, powdered sugar, butter, and vanilla extract in a bowl. Mix well.
Shape filling: Shape peanut butter filling into small balls (about 1 inch in diameter). Place on a parchment-lined baking sheet.
Melt chocolate: Melt dark chocolate in a microwave-safe bowl in 30-second intervals, stirring well.
Assemble cups: Line a muffin tin with paper or silicone liners. Spoon a small amount of melted chocolate into each liner. Place a peanut butter ball on top. Spoon more melted chocolate over the peanut butter filling.
Cool and set: Place muffin tin in the refrigerator for at least 30 minutes. Remove peanut butter cups from liners and store in an airtight container in the refrigerator.