Key Lime Thumbprint Cookie Recipe

KEY LIME THUMBPRINT COOKIES Ingredients 1 cup/250 mL unsalted sweet cream butter 2/3 cup/160 mL light brown sugar 1 tsp/5 mL Watkins Original Gourmet Baking Vanilla 1 large egg yolk 2 1/4 cups/560 mL all-purpose flour 1/2 tsp/2.5 mL salt Lime Filling: 1 cup/250 mL premium white chocolate chips 1/2 cup/125 mL sweetened condensed milk 1 1/2 tsp/7.5 mL Watkins Pure Lime Extract Directions: Beat butter until