Polvorones

Preheat oven to 350°. Line two baking sheets with parchment paper.

In a large bowl, beat powdered sugar, butter, shortening and vanilla with an electric mixer on medium-high speed until smooth and lightened in texture, about 2 minutes. Add flour, 1 teaspoon cinnamon and 1/4 teaspoon salt, beating on low speed until a soft dough forms.

In a small bowl, combine granulated sugar and the remaining 1/2 teaspoon cinnamon and 1/8 teaspoon salt.

Divide dough in half. On a lightly floured surface, shape each half into a fat rope about 10 inches long. Transfer to prepared baking sheets; using your fingertips, flatten ropes to about 1/2 inch thick. Chill until firm, at least 30 minutes.

Trim ends of dough. Cut crosswise into 18 equal strips. One at a time, carefully toss each piece in cinnamon-sugar mixture. Evenly space cookies on prepared baking sheets, cut edges up.

Bake until edges are golden, 15 to 20 minutes. Let cool on baking sheets 5 minutes. Toss again in cinnamon sugar. Transfer cookies to wire racks; cool completely. Store in an airtight container up to 5 days.