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sunken chocolate cake on parchment paper
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Sunken Chocolate Cake with Nutmeg

This intense chocolate cake is dense and moist, with rich flavor. As it cools, it deflates and sinks in the middle, giving it a beautiful crackled texture and the most perfect crumb.
Course cake
Cuisine American
Diet Low Salt
Keyword nutmeg cake, single layer chocolate cake, sunken cake
Prep Time 20 minutes
Cook Time 45 minutes
Servings 8 servings

Ingredients

  • 6 oz [170 g] semisweet or bittersweet chocolate, chopped into bite-sized pieces
  • 1 cup [240 g] strong, freshly brewed coffee, hot
  • 1 cup [2 sticks or 227 g] unsalted butter, at room temperature
  • 1 1/2 cups [300 g] dark brown sugar
  • 3/4 teaspoon salt
  • 1/2 teaspoon freshly ground nutmeg, plus more for dusting (you can omit if you prefer)
  • 2 large eggs, at room temperature
  • 2 teaspoons pure vanilla extract
  • 1 teaspoon baking soda
  • 1 1/2 cups [213 g] all-purpose flour
  • cocoa powder, for dusting

Instructions

  • Position an oven rack in the middle of the oven and preheat the oven to 375F [190C]. Grease an 8 in [20 cm] springform baking pan and line the bottom with a parchment sling, see notes.
  • Place the chopped chocolate in a medium bowl. Pour the hot coffee over the chocolate and let sit for 5 minutes. Stir to combine.
  • In the bowl of a stand mixer fitted with a paddle, beat the butter on medium speed until smooth. Add the dark brown sugar, salt, and nutmeg and mix on medium speed until light and fluffy, 2 to 3 minutes. Add the eggs and vanilla and beat on medium speed until fully incorporated, stopping to scrape down the sides of the bowl as necessary.
  • Add the baking soda and mix again until combined. Add the flour and mix on low speed until incorporated. With the mixer still on low, slowly add the warm coffee-chocolate mixture and mix until combined. Use a spatula to finish mixing the batter, making sure it is completely combined.
  • Pour the batter into the prepared pan and bake for 25 minutes. Lower the oven temperature to 325F [170C] and bake for an additional 15 to 20 more minutes. The loaf will still be moist inside, so a wooden skewer or toothpick inserted into the center won't come out clean. The cake should look moist under the top crust in the cracks that form, and should jiggle just slightly when gently shaken.
  • Transfer the pan to a wire rack and run a knife around the edge of the pan. Let cool for 5 minutes, then unlock the springform pan and remove the side piece. Let the cake cool completely; it will sink in the middle as it cools. When ready to serve, carefully remove the parchment sling from the bottom of the cake. Dust the cake with cocoa powder and grate a little nutmeg over the top of the cake. Slice and serve. The cake can be stored in an airtight container at room temperature for up to 3 days.

Notes

*This cake needs a cake pan with a slightly higher side than a normal pan, as it bakes up tall and can spill over the sides without it. 
*To line the springform pan: place a piece of parchment paper larger than the base of the pan over the bottom, then place the sides of the pan on top and lock the pan shut to hold the paper in place. Crinkle the paper on the outside of the pan and draw it up around the outsides of the pan. 
*I have made this cake many, many times and haven't had a problem with my springform leaking. However, if your pan is known to leak,  you may want to wrap the outside of your pan as well. 
*Throughout my recipes posted on this website, 1 cup of flour equals 142g. Please note that 1 cup of flour can range anywhere from 120g to 142g, depending on the baker or website. I found that after weighting many cups of flour and averaging the total, mine always ended up around this number. If I am posting a recipe from another cookbook, I will use whatever gram measure of flour used in that book, which is why you may see a few posts with a different cup measurement.
Different brands of flour have varying levels of protein, ranging from low to high, which can result in very different outcomes when baking. I’ve found Gold Medal all-purpose unbleached flour to be the best option for many of my recipes; I use it in all the baked goods that don’t use yeast.