This batch of chocolate hazelnut thumbprint cookies quickly earned a spot among my most requested sweets. I first tested the combination on a rainy afternoon when I had a jar of Nutella on the counter and a bag of hazelnuts leftover from a holiday biscotti experiment. The marriage of cocoa-dark shortbread with the toasty crunch of chopped hazelnuts and a glossy Nutella center felt both decadent and familiar—like a grown-up version of a classic cookie from my childhood. Every bite gives you a crisp edge, a tender center, and a burst of creamy hazelnut chocolate in the thumbprint well.

I love these because they travel well and look special without much effort. The dough is easy to make in a stand mixer or by hand, and a long chill time improves texture and depth of flavor. When guests arrive, piping a shiny Nutella ganache into the cooled wells feels like the final flourish that turns simple cookies into something worth photographing. We often share these at neighborhood potlucks and holiday gatherings; they vanish first and friends always ask for the recipe.

Ingredients

• All purpose flour 1 1/2 cups: Use a spoon-and-level method to avoid dense cookies. Brand matters less than correct measuring; King Arthur or similar predictable flours work well.
• Cocoa powder 1/2 cup: Use natural unsweetened cocoa for a bright, chocolatey lift. Dutch-process will give a milder, darker result—either is fine depending on your preference.
• Baking powder 1/2 teaspoon: A small lift helps keep the cookies tender but not cakey; fresh baking powder ensures a light texture.
• Fine sea salt 1/4 teaspoon: Enhances chocolate flavor. If using table salt, reduce slightly.
• Unsalted butter 1/2 cup at room temperature: Room temperature butter creamates with sugar to create air pockets for a delicate crumb. Do not use melted butter.
• Light brown sugar 1/4 cup and granulated sugar 1/2 cup: The brown sugar adds moisture and a hint of caramel note while granulated sugar promotes crisp edges.
• One large egg yolk: Adds richness and binds the dough without making it cakey; reserve the white for another use.
• Vanilla extract 1 teaspoon and milk 1 tablespoon: Vanilla lifts flavor; a touch of milk smooths the dough if it feels dry.
• Finely chopped hazelnuts 3/4 cup: Toast the nuts briefly for maximum flavor, then chop finely. Hazelnut skins can be left on or removed for a cleaner look.
• Nutella 1/2 cup and heavy cream 1/4 cup for ganache: These two combine into a silky filling. Use high-quality Nutella or a comparable chocolate-hazelnut spread for the best flavor.

Instructions

Combine dry ingredients:In a medium bowl whisk together 1 1/2 cups flour, 1/2 cup cocoa powder, 1/2 teaspoon baking powder, and 1/4 teaspoon fine salt until evenly blended. This ensures the cocoa is distributed and avoids streaks in the dough.Cream butter and sugars:In a large bowl or stand mixer fitted with the paddle, beat 1/2 cup room temperature unsalted butter with 1/4 cup light brown sugar and 1/2 cup granulated sugar on medium speed for 2 to 3 minutes until pale and fluffy. Proper creaming traps small air bubbles that help create a tender texture.Add egg yolk and flavor:Mix in one large egg yolk, 1 teaspoon vanilla extract, and 1 tablespoon milk until smooth, stopping to scrape down the bowl so everything incorporates evenly.Incorporate dry mix:With the mixer on low, add the dry ingredients in two additions just until combined. The dough will be crumbly; press it together with clean hands into a smooth ball. Overmixing will toughen the dough.Chill the dough:Cover with plastic wrap and refrigerate at least one hour or overnight. Cold dough is easier to shape and yields cleaner thumbprints that hold their shape while baking.Shape and coat:Let the dough sit 10 to 15 minutes to soften slightly. Scoop 1 tablespoon portions and roll into smooth balls. Roll each ball in 3/4 cup finely chopped hazelnuts until coated, then place on parchment-lined baking sheets spaced 1 1/2 inches apart.Create indentations:Press your thumb or the handle of a wooden spoon into the center of each cookie to form a well. Refrigerate the shaped cookies for another 30 minutes to minimize spreading and keep a deep well for the filling.Bake and cool:Preheat oven to 350 degrees F. Bake for 10 to 12 minutes, or until edges are just set and centers remain slightly soft. If the wells puff, gently press them down while cookies are warm. Cool on the baking sheet 5 minutes, then transfer to a wire rack to cool completely.Make Nutella ganache:Place 1/2 cup Nutella in a heatproof bowl. Heat 1/4 cup heavy cream in a small saucepan until just simmering. Pour hot cream over Nutella and let sit 5 minutes, then whisk until smooth. The ganache will be soft at first and will thicken as it cools; if it firms too much, warm briefly in a double boiler.Fill the wells:Transfer ganache to a piping bag and snip the tip. Pipe a generous dollop into each cooled cookie well and allow to set at room temperature for about 20 minutes, or refrigerate briefly to speed firming.

Storage Tips

Store baked cookies in an airtight container at room temperature for up to three days. If filled with ganache, refrigeration will extend life to 7 days—place a sheet of parchment between layers to prevent sticking. For freezing, arrange baked but unfilled cookies on a tray, flash freeze until firm, then transfer to a freezer bag for up to three months. To serve from frozen, thaw in the refrigerator overnight, then bring to room temperature before piping the ganache so the filling holds its shape.

Ingredient Substitutions

If you do not have hazelnuts, finely chopped almonds or pecans make an excellent substitute; almonds give a cleaner flavor while pecans add buttery depth. Swap Nutella for any chocolate-hazelnut spread or use equal parts chopped chocolate and hazelnut butter melted with cream for a less sweet filling. For a gluten-free option use a 1-to-1 gluten-free flour blend and reduce chilling slightly as gluten-free dough can firm more quickly. To make dairy-free, use a plant-based butter and a dairy-free chocolate spread with coconut cream in place of heavy cream.

Serving Suggestions

These cookies look lovely on a platter garnished with lightly toasted whole hazelnuts and a dusting of cocoa. Serve with espresso or black tea to balance sweetness, or alongside a scoop of vanilla ice cream for an extra indulgent dessert. For holiday gatherings, arrange with shortbread and citrus cookies to create a varied cookie tray; the chocolate-hazelnut flavor pairs especially well with orange-scented confections.

Cultural Background

Thumbprint-style cookies have a storied history across Europe, often filled with jam in Scandinavian and Central European traditions. The use of hazelnuts and a chocolate-hazelnut spread nods to Italian influences, with Nutella originating in Piedmont where hazelnuts are celebrated. This version blends a classic European technique with contemporary pantry flavors, bridging nostalgic home baking with modern convenience.

Seasonal Adaptations

In winter add 1/4 teaspoon ground cinnamon or a pinch of orange zest to the dough for festive warmth. For spring and summer trade the Nutella ganache for a tart raspberry curd or lemon curd to brighten the flavor. In autumn, fold 1 tablespoon finely ground toasted hazelnut into the dough for extra nuttiness and sprinkle flaky sea salt on the filled wells to contrast the sweet ganache.

Meal Prep Tips

Make the dough up to 3 days ahead and keep it wrapped in the refrigerator, or shape the balls and freeze them on a tray before transferring to a bag for up to three months. Bake straight from frozen, adding 1 to 2 minutes to the baking time. The ganache can be prepared a day in advance and rewarmed gently if it firms. For batches, pipe ganache just before serving to maintain the glossy finish.

These cookies are a small luxury that prove a simple technique and a few quality ingredients go a long way. I hope you enjoy the process of making and sharing them as much as we do.