Cream together butter and 1 cup of sugar with an electric mixer until fluffy. Add in the egg, lemon extract, and corn syrup, and a few drops of yellow food coloring (if using) and beat until combined.

In a medium bowl, sift together the flour, baking soda, and baking powder. Add to creamed mixture, beating a little at a time until fully incorporated and smooth. Stir in the white chocolate chips. Cover dough and chill in the fridge for one hour.

Preheat oven to 325 degrees and line baking sheets with parchment paper. Roll chilled dough into balls (about 1/8 cup each) and roll in the remaining 1/4 cup sugar. Bake on prepared cookie sheets for 10-12 minutes, until edges are set. Cool on a wire rack before enjoying.