Step 1

Place the pistachios and 1/3 cup (67g) brown sugar in a food processor. Pulse into a very fine crumb. Set aside.

Step 2

Whisk the flour, baking powder, cinnamon, and salt together in a medium bowl. Set aside.

Step 3

In a large bowl using a hand-held or stand mixer fitted with a paddle attachment, beat the butter and remaining 1/3 cup (67g) brown sugar together on high speed until completely smooth and creamy, about 2 minutes. Add the egg and vanilla extract, and beat on high speed until combined, about 1 minute. Scrape down the sides and up the bottom of the bowl and beat again as needed to combine.

Step 4

Add the flour mixture AND the ground pistachio mixture to the wet ingredients and mix on low until combined. It will be crumbly at first, but will come together after a couple minutes of mixing.

Step 5

Divide the dough into 2 equal portions, gently flatten into discs, and wrap each in plastic wrap. Chill the discs in the refrigerator for at least 3 hours (and up to 4 days). If chilling for longer than 3 hours, allow to sit at room temperature for at least 30 minutes before rolling because the dough will be quite hard.

Step 6

Preheat oven to 350°F (180°C). Line baking sheets with parchment paper or silicone baking mats. (Always recommended for cookies.) Set aside.

Step 7

Remove 1 disc of chilled cookie dough from the refrigerator. Generously flour a work surface, as well as your hands and the rolling pin. The dough may become sticky as you work, so keep extra flour nearby to use as needed. Alternatively, the dough may crack when rolling out. Wait a few minutes for it to soften back up. The more you work with it, the softer (and easier to work with) it will become. Roll out the disc until 1/4 inch thick. Using a 2-inch round or fluted cookie cutter, cut dough into circles. Reroll the remaining dough and continue cutting until all is used. Repeat with the second disc of dough. You should have about 64 circles.

Step 8

Using a 1-inch round or fluted cookie cutter, cut a hole into the center of 32 of the circles. Let’s call these 32 cookies the “donut cookies” because of that center hole.

Step 9

Arrange the whole circles and the donut cookies 2 inches apart and on separate baking sheets (because the donut cookies take 1 less minute to bake).

Step 10

Bake the whole circles for about 11 minutes, or until lightly browned around the edges, and bake the donut cookies for about 10 minutes. Rotate the baking sheets halfway through the bake time. Allow cookies to cool on the baking sheets for 5 minutes. Dust the “donut cookies” with confectioners’ sugar, then transfer all of the cookies to a wire rack to cool completely before assembling.

Step 11

Spread 1/2 teaspoon of jam on each whole cookie. Carefully top each with a donut cookie and press down gently to create a cookie sandwich.

Step 12

Cookies will stay fresh covered at room temperature for 2 days or in the refrigerator for up to 1 week.