Black-and-White Ice Cream Sandwiches

Ingredients

• 1 large egg yolk
• ¼ cup unsweetened cocoa powder (preferably Dutch-process)
• 1 teaspoon vanilla extract
• 1 ¼ cups all purpose flour
• 10 ounces good-quality white chocolate (such as Lindt or Baker's)
• 2 pints mint chocolate chip ice cream
• 12 tablespoons unsalted butter
• + 2 more ingredients
• • ¼ teaspoon salt
  • 10 tablespoons sugar

Drop six 2/3-cup mounds mint chocolate chip ice cream onto waxed-paper-lined baking sheet. Using metal spatula, shape each mound into 3- to 3 1/2-inch square; freeze squares. Beat butter and sugar in large bowl until smooth. Beat in egg yolk and vanilla. Sift flour, cocoa and salt onto butter mix...

View full recipe at Epicurious