Pecan & Blackberry Jam Thumbprint Cookies

These tender, crumbly butter cookies are filled with a jewel-bright spoonful of blackberry jam, inspired by the kind of celebratory pastry trays found at Romanian holiday tables. The dough is made with Janie's Mill white wheat flour (a bolted/sifted whole wheat) in place of all-purpose flour, adding a mild, nutty earthiness that complements the pecans beautifully — the cookies will still be tender but with a slightly more wholesome, hearty crumb rather than the ultra-short, melt-in-your-mouth texture of a standard thumbprint. The deep, sweet-tart flavor of blackberry jam pairs beautifully with the buttery pecan dough, and the jam center turns glossy and lightly set in the oven — stunning on a plate with almost no extra effort.

Ingredients

• raw pecan halves – 3/4 cup
• granulated sugar – 2 tablespoons

• unsalted butter, at room temperature – 1/2 cup (1 stick)
• powdered sugar, sifted – 1/3 cup
• large egg yolk (save white for another use) – 1 yolk
• pure vanilla extract – 1 teaspoon
• Janie's Mill white wheat flour (bolted/sifted whole wheat) – 1 1/4 cups
• fine sea salt – 1/4 teaspoon

• blackberry jam (good quality, thick) – 1/4 cup
• powdered sugar, for dusting – 2 tablespoons

Instructions

1. Make the pecan sugar: pulse the pecans and granulated sugar in a food processor until the nuts are finely ground but not paste-like — the texture should resemble coarse sand. Watch carefully, as pecans have a higher fat content than walnuts and can turn to paste more quickly. Set aside. (No food processor? Chop pecans very finely by hand, then stir in the sugar.)
2. In a stand mixer fitted with the paddle attachment, beat the butter and powdered sugar on medium speed for about 3 minutes, until pale and fluffy. Scrape down the bowl, then add the egg yolk and vanilla extract and beat another 30 seconds until combined.
3. Add the Janie's Mill white wheat flour, salt, and all of the pecan sugar to the bowl. Mix on low speed just until the dough comes together — it will be soft and slightly crumbly. Do not overmix. Wrap the dough in plastic wrap and refrigerate for at least 45 minutes (or up to 24 hours); this firms it up so the cookies hold their shape and the thumbprint doesn't collapse. Note: white wheat flour absorbs moisture slightly differently than all-purpose — if the dough feels too dry or won't hold together after chilling, knead in 1 to 2 teaspoons (5–10g) of softened butter before rolling.
4. Preheat your oven to 350°F / 175°C (convection: 325°F / 165°C). Line two baking sheets with parchment paper.
5. Roll the chilled dough into 1-inch (2.5 cm) balls — about 1 tablespoon of dough each — and place them 1 1/2 inches apart on the prepared sheets. Press a deep well into the center of each ball using your thumb or the handle of a wooden spoon. If the edges crack, simply press them back together gently.
6. Fill each well with a scant 1/2 teaspoon of blackberry jam. Don't overfill — the jam bubbles and spreads slightly in the oven, and too much will overflow. Bake for 13 to 15 minutes, until the edges are just barely golden and the jam looks set and glossy. The centers may look slightly underdone; they firm as they cool.
7. Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely. Once fully cool, dust lightly with powdered sugar, letting it catch in the dough while avoiding the jam centers for a snow-dusted effect.