Ingredients
3/4 cup butter, softened1/2 cup sugar1 large egg yolk, room temperature1/2 teaspoon vanilla extract2 cups all-purpose flour1/4 cup finely chopped walnutsFILLING:3 tablespoons butter, softened4-1/2 teaspoons lemon juice3/4 teaspoon grated orange zest1-1/2 cups confectioners’ sugar2 drops yellow food coloring, optional
Preparation
In a large bowl, cream butter and sugar until light and fluffy, 5-7 minutes. Beat in the egg yolk and vanilla. Gradually add flour and mix well.
Divide dough in half and shape each half into a 14-in. roll; reshape each roll into a 14x1-1/8x1-1/8-in. block. Wrap and refrigerate overnight.
Unwrap dough and cut into 1/4-in. slices. Place 2 in. apart on ungreased baking sheets. Sprinkle half the cookies with nuts, gently pressing into dough.
Bake at 400° for 8-10 minutes or until golden brown around the edges. Remove to wire racks to cool completely.
In a small bowl, cream the butter, lemon juice and orange zest until fluffy. Gradually add confectioners’ sugar until smooth. Tint yellow if desired. Spread about 1 teaspoon filling on bottoms of the plain cookies; place nut-topped cookies over filling.
