Measure the crushed vanilla wafers, confectioners’ sugar, cocoa powder, finely chopped pecans, vanilla extract, light corn syrup, and spiced rum before beginning. Have each ingredient ready for mixing.

Place the crushed vanilla wafers, confectioners’ sugar, cocoa powder, and chopped pecans in a large mixing bowl. Stir thoroughly until the cocoa and sugar are evenly dispersed throughout the cookie crumbs and nuts.

Pour the vanilla extract, light corn syrup, and spiced rum over the dry mixture. Stir thoroughly until everything is evenly combined and no visibly dry areas remain. The finished mixture should have a uniformly moist consistency.

Take a small portion of the mixture and compress it between your hands to form a ball. If it remains intact, the mixture is ready for shaping. If it crumbles or seems excessively dry, incorporate a small quantity of additional crushed wafers or spiced rum as needed until the desired consistency is achieved.

Portion the mixture with a cookie scoop, then roll each serving between your palms to create balls approximately 1 inch in diameter. Keep the portions similar in size for uniform results.

Choose confectioners’ sugar, cocoa powder, sprinkles, or crushed nuts for the exterior. Roll each rum ball through the selected coating until its surface is evenly covered.

Arrange the coated rum balls in an airtight container and refrigerate for at least 1 hour. Chilling allows the treats to become firmer while giving the flavors time to blend. Serve chilled.