Toffee Sugar Cookies

Ingredients

• 2 cups all-purpose flour
• 1 tsp baking powder
• 1/4 tsp salt
• 1/2 cup butter, at room temperature
• 3/4 cup granulated sugar
• 1 egg
• 1 Tbsp milk (2%)
• 1 Tbsp grated lemon zest
• 1 tsp vanilla extract
• 1/2 cup HEATH BITS O' BRICKLE Toffee Bits, divided
• 2 pasteurized egg whites
• 1/4 tsp cream of tartar
• salt
• 2 cups icing sugar, sifted
• 2 Tbsps lemon juice