Dark Chocolate Ganache Tart

Steps

1. 1

   Mix the crust dough

   • In a food processor, combine the softened unsalted butter, all-purpose flour, powdered sugar, and fine sea salt.
   • Pulse 6–8 times until the mixture resembles coarse breadcrumbs—pieces of butter should still be visible (about pea-sized).
   • Add the room-temperature egg yolk and pulse 2–3 more times until the dough just begins to come together.
   • Do not overmix; you want a short, crumbly dough, not a smooth ball.

   + Show details− Hide details

   Ready when: Mixture resembles coarse breadcrumbs with pea-sized butter pieces visible; dough just begins to come together when pressed

   Tip: Do not overmix the crust dough. Overworking develops gluten and makes the shortbread tough. If using a mixing bowl and fork instead of a food processor, work quickly to keep the dough cold.

2. 2

   Press crust into tart pan

   • Press the dough firmly and evenly across the bottom and up the sides of a 9-inch (23 cm) tart pan with a removable bottom.
   • Use the heel of your hand and your fingers, pressing from the center outward.
   • Create an even ¼-inch (0.6 cm) layer, making sure the crust reaches the top edge of the pan.
   • If the dough tears, patch it with small pieces of dough scraps.
   • Cover with plastic wrap and refrigerate for 15 minutes while you preheat the oven.

   + Show details− Hide details

   Ready when: Dough is pressed evenly into pan with no visible thin spots or holes

   Tip: Keep your hands cool and work quickly. If the dough becomes too warm and sticky, return it to the refrigerator for 5 minutes.

3. 3

   Blind bake the crust shellOven 325°F / 165°C

   • Preheat the oven to 325°F (165°C).
   • Line the chilled crust with parchment paper and fill the center with pie weights or dried beans, pressing them gently against the bottom and sides.
   • Place the tart pan on a baking sheet.
   • Bake for 12 minutes, then carefully remove the parchment and weights.
   • Continue baking for 5–8 minutes more until the crust is pale golden and the surface feels dry to the touch.
   • The edges may be slightly darker.
   • Remove from the oven and let cool on a wire rack for 3–5 minutes.

   + Show details− Hide details

   Ready when: Crust is pale golden with a dry surface; edges may be slightly darker

   Tip: Blind baking prevents a soggy crust. If the crust puffs up significantly during blind baking, gently prick it with a fork before continuing. Do not allow the edges to brown too much or they will taste burnt.

4. 4

   Heat cream for ganache

   • While the crust cools, pour the heavy cream into a 2-quart (2-liter) saucepan.
   • Heat over medium heat, stirring occasionally, until small bubbles appear around the edges and the cream begins to steam noticeably.
   • This should take 3–4 minutes.
   • You want the cream very hot but not boiling—if it reaches a full rolling boil, it may separate later.
   • Remove from heat immediately and set aside.

   + Show details− Hide details

   Ready when: Cream steams and small bubbles form around the edges; do not boil

   Tip: Heating the cream ensures the chocolate melts smoothly and the ganache becomes silky. Avoid boiling, which can cause the fat to separate.

5. 5

   Create the chocolate ganache

   • Place the finely chopped dark chocolate in a heatproof bowl.
   • Pour the hot cream slowly over the chocolate while stirring gently with a whisk.
   • Let the mixture sit undisturbed for 30 seconds—the residual heat will begin to melt the chocolate.
   • Add the room-temperature butter and whisk gently in circular motions until the mixture becomes smooth, glossy, and uniform in color (about 2 minutes of whisking).
   • If small specks of unmelted chocolate remain, set the bowl over a pot of gently simmering water (double boiler) for 10–15 seconds at a time, whisking between intervals, until fully smooth.
   • Remove from heat immediately once smooth.

   + Show details− Hide details

   Ready when: Ganache is smooth, glossy, and uniform in color with no visible lumps

   Tip: Do not overmix the ganache once it reaches smooth consistency. Overworking can break the emulsion and make it grainy. If the ganache does separate, whisk in 1 tablespoon (15 ml) of cold cream at a time until silky.

6. 6

   Fill the tart

   • Pour the warm ganache into the cooled shortbread crust, spreading it gently with an offset spatula or the back of a spoon to create an even layer.
   • Do not overwork the ganache—a few minor surface imperfections are fine.
   • If you are garnishing with fleur de sel or dark chocolate shavings, add them while the ganache is still warm and glossy, before it begins to set.

   + Show details− Hide details

   Ready when: Ganache is evenly spread in the crust

   Tip: Pour the ganache while still warm so it flows into an even layer. If the ganache cools too much before pouring, briefly warm it over a double boiler for 10 seconds at a time—do not reheat in the microwave, as uneven melting can affect texture.

7. 7

   Chill until set

   • Place the tart (still in its pan) on a level shelf in the refrigerator for at least 4 hours, or up to overnight.
   • During this time, the ganache will firm to a fudgy consistency and the flavors will develop and deepen.
   • For the best texture and easier slicing, remove the tart from the refrigerator 15 minutes before serving.
   • This allows the ganache to soften slightly, preventing cracking when you slice.

   + Show details− Hide details

   Ready when: Ganache is firm to the touch and set throughout

   Tip: The tart can be made up to 2 days ahead and stored covered in the refrigerator. If the ganache becomes too hard and dense, you likely left it in the fridge too long—remove it 20–30 minutes before serving instead of 15.