3 cups flour
2 1/2 teaspoons baking powder
1/8 teaspoon salt
2/3 cup (1 stick plus 3 tablespoons) softened butter
1 cup granulated sugar
3 large eggs, whipped (plus 1 egg mixed with a teaspoon of water for egg wash)
1/4 teaspoon lemon extract
Zest from 2 lemons
Preheat oven to 375 degrees. Combine all ingredients and mix until smooth.
Divide dough in half and roll into two logs about 12-inches long. Flatten top. Transfer logs to cookie sheets, brush with egg wash and bake at 375 degrees for 20 minutes.
Let logs cool slightly, then carefully transfer to a cutting board and cut crosswise into cookies about 1/2-inch thick. Transfer individual cookies back to cookie sheet, standing them on edge. Bake again for about 5 minutes or until just dry.
Makes about 40 biscotti