1 box Pillsbury lime cookie mix
1 stick soft butter
1/4 cup flour
2 teaspoons sour salt
1 teaspoon lime zest
Heat oven to 350°F.
Combine egg and butter and flavorings. Add flour, zest, and cookie mix and mix well.
Mixture will be stiff
Divide dough into 2 equal portions; shape each into 1 1/2 inch wide log about 2 inches tall
On cookie sheet, place logs 3 inches apart; sprinkle with coarse sugar and a bit of coarse salt.
Bake 15 to 20 minutes.
Cool 15 to 20 minutes.
Reduce oven temperature to 200°F.
With sharp knife, carefully cut each log into slices.
On same cookie sheet, place slices on their side
Return to oven; bake 1 hour.
Remove cookies from cookie sheet to cooling rack.