Preheat oven to 300°F.

Add sugar to a large mixer bowl.  

Add lemon zest and using your fingers, rub lemon zest into sugar until it is well distributed.  

Add flour and white chocolate and mix together on low speed with electric mixer about 30 seconds.  

Add butter and mix at low speed until all combined.  

Turn mixer up to medium and mix until dough comes together.

Pour onto a lightly floured surface and knead together into a disc shape.  

Roll dough with a rolling pin to about ½ inch thickness.

Use a cookie or biscuit cutter to cut into desired shapes.  

Place on a lined baking sheet.

Bake for 20-22 minutes or until very lightly browned.

Remove to a wire rack to cool.

For glaze: In a small bowl add powdered sugar, lemon juice and lemon zest.  Whisk together until smooth.  

Spread glaze over cookies when they are cool.  

Return to wire rack for glaze to set up.