1 (1 pound, 1.5 ounce) package dry sugar cookie mix (recommended: Betty Crocker)
4 ounces cream cheese, softened
1 to 1 1/4 cups all-purpose flour
1/2 to 3/4 teaspoon lemon extract
2 eggs
1 tablespoon grated lemon zest
Flour, for dusting work surface
Powdered sugar, for garnishing