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| all-purpose flour (unsifted): 1 1/3 cups |
| cornstarch: 2/3 cup |
| salt: 1/4 tsp |
| unsalted butter: 1 cup |
| lemon zest: 1 Tbl |
| vanilla extract: 1 tsp |
| lemon zest: 1 Tbl |
| lemon juice: 1 Tbl |
| light corn syrup: 2 Tbl |
| unsalted butter: 1/4 cup |
| powdered sugar (sifted): 1/2 cup |
| powdered sugar (sifted): 1 cup |
Credit: www.food.com
1
Preheat oven to 350°F with rack in middle. Line 2 large baking sheets with parchment paper.
2
Whisk together flour, cornstarch, and salt.
3
Beat together butter and confectioners sugar with an electric mixer until pale and fluffy, then beat in zest and vanilla. At low speed, mix in flour mixture just until a soft dough forms.
4
Put sanding sugars in different bowls. Roll a scant tsp of dough into a ball and drop into sugar, turning to coat. Reshape if necessary and transfer to a baking sheet. Repeat, spacing balls 3/4 inch apart, until baking sheet is filled.
5
Bake until tops are slightly cracked but still pale (bottoms will be pale golden), 12 to 15 minutes. Transfer cookies on parchment to a rack to cool completely.
6
Form and bake more cookies on second baking sheet.
7
Make Filling and Sandwich Cookies: Beat butter then add all other filling ingredients in a large bowl with an electric mixer at medium speed until combined well. Transfer to sealable bag and snip off a corner.
8
Turn over half of cookies and pipe about 1/2 tsp filling on flat side of each. Sandwich with remaining cookies, pressing gently.