Preheat oven to 350°. Prepare Truffle Fudge Brownie Mix according to package directions using butter and eggs. Transfer to a greased 9x13-inch baking pan. Bake 20-25 minutes. Cool completely. Cut 48 (1½-inch oval) eggs out of the brownies.
Place almond bark in individual microwave-safe bowls for desired number of colors; microwave according to package directions. Stir in different colors of food coloring to create desired pastel colors.
Dip brownie eggs in different colored almond bark. Set on a cooling rack. Place remaining colored almond bark in small resealable bags; seal. Cut one color of each bag to create a piping bag. Decorate with piped almond bark and decorative sprinkles. Let almond bark set up completely. Makes 48 truffles.