1 (18.25 ounce) box yellow or chocolate cake mix
1 (3.4 ounce) box instant vanilla or chocolate
    pudding and pie filling mix
4 eggs
1/2 cup vegetable oil
3/4 cup Bailey's Irish Cream liqueur
Sifted confectioners sugar, Baileys Irish Cream Glaze
    or Baileys Cream Cheese Frosting (for garnish)

Preheat oven to 350 degrees F.

In a large bowl, combine cake mix, pudding mix, eggs, and oil. Beat at medium speed of an electric mixer, scraping down sides of bowl as necessary. Beat in liqueur. Spoon into a greased 10-inch Bundt or tube pan. Bake  for about 50 minutes, or until a cake tester inserted into the center of the cake comes out clean. Cool in pan for 10 minutes, then turn out onto a wire rack to finish cooling.

Turn Bundt cake upside-down and tube cake, right-side-up or upside down as desired; sift confectioners sugar over top of cake or drizzle Baileys Irish Cream Glaze over top and down sides of cake. Or, frost cake with Baileys Cream Cheese Frosting. Store in an airtight container at room temperature or in the refrigerator. May also freeze cake, tightly wrapped in aluminum foil, for up to 3 months.

Bailey's Irish Cream Glaze
About 1/2 (16 ounce) package confectioners sugar, sifted
1 tablespoon butter (at room temperature)
3 to 4 tablespoond Baileys Irish Cream liqueur

In a deep small bowl, beat confectioners sugar together; gradually beat in liqueur until desired drizzling consistency is achieved and glaze is smooth.