Drunken Peanut Butter Cups

In a mason jar, combine vodka and Reese’s pieces. Cover with tight-fitting lid and shake. Refrigerate overnight, then strain. Fill a cocktail shaker with ice then pour over strained vodka, milk, and chocolate liqueur. Shake until chilled. Put peanut butter on one small plate and crushed Reese's Pieces on another. Dunk tops of two cocktail glasses in peanut butter then roll in crushed Reese's Pieces. Drizzle about a tablespoon of chocolate syrup into each glass. Divide cocktail mixture between glasses and garnish each with a peanut butter cup.