Mascarpone Pumpkin Tart with Pecan Crunch
Pumpkin pie is a custard, which means its whole personality comes down to one ratio: how much egg is holding how much liquid. Get it wrong and you either get a rubbery, cracked slab or a loose puddle that never sets. This tart leans on the same science but swaps the rhythm — mascarpone and a splash of cream carry the richness that heavy cream usually does, so the filling bakes up silky and sliceable at once, with a texture closer to a French silk tart than a dense pie. The mascarpone is the part people get nervous about, because it is a fresh cheese, and fresh cheese plus eggs plus heat is how curdling happens. The fix is temperature and order, not skill: the mascarpone has to come to room temperature before you start, it gets beaten smooth with the sugar first so it turns soft and uniform, and only then do the eggs go in — one at a time, whisked just until combined. Cold mascarpone hitting a warm mixture is what breaks it, and overbeating eggs is what fills a custard with air bubbles that turn into cracks, so you fold, you don't whip. The pecan crunch on top is its own small science project: you toast the pecans first to wake them up, then caramelize them in butter, brown sugar, and maple syrup until the mixture climbs to the soft-crack stage — that is the temperature where sugar turns glassy as it cools, which is exactly what makes the topping snap into shards instead of turning sticky and soft. Food-safety-wise this is a fully-set bake: the custard is done when an instant-read thermometer reads 175°F in the center, the temperature where the eggs are completely set, and from there it goes straight into the fridge to chill. Keep it cold until serving and don't leave it out more than two hours. If this Thanksgiving-leaning-but-not-pie energy is your thing, our Brûléed Pumpkin Custard Cups and Pumpkin Churro Cheesecake Bars ride the same wavelength, and for the full stacked holiday showstopper, our PieCaken goes all the way.
Dessert · Thanksgiving, Pumpkin, Mascarpone, Make-Ahead • 1 hr 25 min + 3 hr chill
Nutrition (per serving)430Calories·29gFat·39gCarbs·6gProtein
Per serving. Values are approximate and calculated from USDA FoodData Central.
Ingredients
- For the pecan-graham crust:
- 1¼ cups (about 9 full sheets, 150g) graham cracker crumbs
- ½ cup (55g) pecans, toasted and finely ground
- 3 tablespoons light brown sugar, packed
- ½ teaspoon kosher salt
- 6 tablespoons (85g) unsalted butter, melted
- For the mascarpone-pumpkin custard:
- 8 ounces (1 cup) mascarpone, at room temperature
- ¾ cup (150g) light brown sugar, packed
- 1 (15-ounce) can pumpkin purée (not pie filling)
- ½ cup heavy cream
- 1 teaspoon vanilla extract
- 1 teaspoon ground cinnamon
- ½ teaspoon ground ginger
- ¼ teaspoon ground nutmeg
- ¼ teaspoon ground cloves
- ¼ teaspoon kosher salt
- 2 large eggs, at room temperature
- 1 large egg yolk, at room temperature
- For the candied pecan crunch:
- 1¼ cups (140g) pecan halves
- 2 tablespoons unsalted butter
- ¼ cup (50g) light brown sugar, packed
- 2 tablespoons maple syrup
- ½ teaspoon flaky sea salt
- ⅛ teaspoon cayenne pepper (optional)
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Steps
- Toast the pecans: Position a rack in the center of the oven and preheat to 350°F. Spread all the pecans — the 1¼ cups for the crunch plus the ½ cup for the crust — on a rimmed baking sheet and toast until fragrant and a shade darker, 8 to 10 minutes, shaking once. Let cool, then finely grind ½ cup of them for the crust and leave the rest in halves for the crunch.
- Make the crust: In a medium bowl, stir together the graham cracker crumbs, finely ground toasted pecans, brown sugar, and salt. Pour in the melted butter and stir with a fork until every crumb is moistened and the mixture holds together when squeezed. Press it evenly across the bottom and up the sides of a 9-inch tart pan with a removable bottom, using the flat bottom of a measuring cup to pack it firmly. Freeze for 15 minutes.
- Blind-bake the crust: Bake the chilled crust at 350°F until it is set and just beginning to brown at the edges, 10 to 12 minutes. Transfer to a wire rack to cool while you make the filling, and reduce the oven temperature to 325°F.
- Make the candied pecan crunch: In a medium skillet over medium heat, melt the butter, then stir in the brown sugar and maple syrup and cook, stirring, until the sugar dissolves and the mixture bubbles thickly, about 2 minutes. Add the toasted pecan halves and toss to coat, then cook, stirring constantly, until the nuts are glossy and the syrup darkens to amber and reaches the soft-crack stage (about 300°F on an instant-read thermometer), 2 to 3 minutes more. Immediately scrape onto a parchment-lined plate, spread into a single layer, and sprinkle with the flaky salt and cayenne, if using. Let cool completely until hard, then break into shards and set aside.
- Make the custard: In a large bowl, whisk the room-temperature mascarpone and brown sugar together until completely smooth and free of lumps — this step is what keeps the mascarpone from curdling later, so beat it out now while it is still cool, not hot. Whisk in the pumpkin purée, heavy cream, vanilla, cinnamon, ginger, nutmeg, cloves, and salt until uniform. Add the 2 eggs and the yolk one at a time, whisking gently just until each disappears into the mixture. Do not overbeat — too much air is what makes custards crack in the oven.
- Fill and bake: Pour the custard into the cooled crust and smooth the top with a spatula. Bake at 325°F until the edges are set and the center still has a slight wobble when the pan is nudged, 35 to 40 minutes — an instant-read thermometer inserted into the center should read 175°F, the temperature at which the eggs are fully set and the custard is food-safe. The tart will continue to set as it cools, so a faint jiggle in the middle is exactly what you want.
- Cool and chill: Let the tart cool completely on a wire rack for about 1 hour, then cover and refrigerate until fully chilled and firm, at least 3 hours or overnight. Chilling is what gives the custard its clean, silky slice.
- Top and serve: Just before serving, pile the candied pecan shards over the center of the tart (add them no more than an hour ahead so they stay crisp). For the cleanest slices, dip a sharp knife in hot water and wipe it dry between cuts. Serve chilled or at a cool room temperature, and return any leftovers to the refrigerator within 2 hours.
Tips & Variations
Make Ahead
This tart is built to be made ahead, and it is better for it. Bake the whole tart up to 2 days in advance: cool it completely, cover, and refrigerate, then add the pecan crunch the day you serve. The candied pecans can be made up to a week ahead and stored in an airtight container at room temperature — keep them in a single layer or they will stick together. The crust can be pressed into the pan and refrigerated (unbaked) up to 1 day ahead, or blind-baked and held at room temperature the morning of. The custard is at its silkiest after a full overnight chill, so for Thanksgiving, bake it Wednesday and top it Thursday.
Storage
Cover and refrigerate the tart for up to 4 days. Because the filling is an egg-and-dairy custard, it must stay cold — do not leave it at room temperature for more than 2 hours. The pecan crunch will soften once it sits on the chilled custard, so if you have leftovers, lift off any remaining shards and store them separately at room temperature to keep them crisp, or accept a slightly softer topping. Do not freeze the assembled tart; the custard will weep and turn watery as it thaws.
Substitutions
No mascarpone? Use full-fat cream cheese (the block kind, not the tub) in equal measure — the filling sets slightly firmer and a touch tangier, but the method is identical. Swap the graham crackers for crushed Biscoff cookies or gingersnaps for a spicier crust. Use maple sugar or coconut sugar in place of the brown sugar in the custard. For the crunch, walnuts or a pecan-walnut mix work beautifully. To make it dairy-free, this recipe is not a good candidate — the mascarpone and cream are load-bearing — but you can swap in a full-fat coconut cream pumpkin custard and skip the cheese entirely, adjusting the eggs up to 3 whole eggs to help it set. If you only have pumpkin pie spice, use 2 teaspoons in place of the individual spices.
Nutrition
Per serving: 1 slice (of 10)
Reviews
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