Cherry Truffle Cups: Omit pecans. Substitute 2 tablespoons cherry liqueur for the praline liqueur. Place candied cherry half in each cup before filling with chocolate mixture.
Crème de Menthe Truffle Cups: Substitute 1/4 cup finely ground almonds for the pecans and 2 tablespoons crème de menthe for the praline liqueur.
Raspberry Truffle Cups: Omit pecans. Substitute 2 tablespoons raspberry liqueur for the praline liqueur. Place fresh raspberry in each cup before filling with chocolate mixture.
You can find tiny paper candy cups in the baking section of most grocery stores. If your store doesn't carry them, check out a cake decorating supply store or mail-order company.
A food processor is the best tool for finely grinding pecans. Use quick pulses to avoid turning the pecans into an oily mess.