Chocolate Sweetheart Cake Recipes

Steps:

• Heat oven to 350 degrees Fahrenheit/170 degrees Celsius. Grease a 9-inch/23-centimeter round springform pan with butter and line with parchment paper, then set aside.
• Make the cake: Place butter, chocolate and hot coffee in a large heatproof bowl and mix well until everything is melted, combined and smooth. Whisk in sugar by hand until dissolved. Add eggs and vanilla extract and whisk again until thoroughly combined and smooth. Sift flour, cocoa powder and salt together into a bowl and then whisk this into the melted chocolate mixture. The batter here is liquid, but don't think you have missed something; this is how it should be.
• Pour batter into the prepared pan and bake for 1 hour, or until the cake is cooked and a skewer inserted into the center comes out clean or with just a few dry crumbs attached. The top will form a crust and crack a little, but don't worry, this is expected. Leave the cake to cool for 20 minutes before removing from the pan, then set aside until completely cool.
• Make the chocolate ganache, if desired: Place chocolate pieces in a food processor, process until fine and set aside. Combine cream and corn syrup in a small pan and place over medium-high heat. As soon as bubbles begin to appear (just before it comes to a boil), remove from the heat. Get the food processor running again, with the chocolate still inside, and pour in the hot cream in a steady stream. Process for 10 seconds, then add butter. Continue to process until mixture is shiny and smooth. (You can also make the ganache by hand; just make sure the chocolate is chopped fairly finely before adding the cream mixture. Stir with a wooden spoon until almost melted, then add the butter. Stir again until the ganache is smooth.)
• Use a rubber spatula to scrape the ganache into a bowl and cover with plastic wrap, with the plastic actually touching the top of the ganache. Set aside until it has set to the consistency you want. If you want a thin layer to spread over the cake, it can be poured over while liquid so that you get an even, light and shiny coating. For a thicker ganache with a spreading consistency, leave it for about 2 hours at room temperature. (The ganache can be stored at room temperature, providing it's not too warm, for 3 days or kept in the fridge for up to 2 weeks. It can also be frozen, although it will lose a bit of its shine when defrosted.)
• Make the espresso cinnamon mascarpone cream, if desired: Place all the ingredients in the bowl of an electric mixer fitted with the whisk attachment. Beat for 1 to 2 minutes, until soft peaks form.
• Peel the parchment from the cake and discard. Transfer to a serving platter and spread the ganache, if using, on top of the cake. Slice into wedges, divide the cake among plates and, if using, spoon the mascarpone cream alongside. With or without icing, the cake will keep well for 4 to 5 days in an airtight container.

Steps:

• Microwave the butter in a microwave-safe mug in 10-second increments until melted, 20 to 30 seconds. Crack the egg into a small bowl; add the vanilla and whisk to combine using a small whisk or fork. Pour the egg mixture into the mug over the butter and whisk to combine.
• Add the sugar, cocoa powder and salt and whisk until mostly smooth (a few lumps are O.K.). Scrape down the sides the best you can with a spoon or a small silicone spatula. Sprinkle with mini chocolate chips, if desired.
• Cook in the microwave on high for 1 to 1 1/2 minutes, or until a toothpick inserted in the center comes out mostly clean. Sift a little confectioners' sugar on top or serve with a scoop of vanilla ice cream, if desired. Dig in with a spoon.

Steps:

• Preheat the oven to 350 degrees F. Butter and flour an 8-inch springform pan.
• Place a large heatproof bowl over a pot of simmering water, making sure the water doesn't touch the bowl. Put the butter and chocolate in the bowl, stirring occasionally, until the chocolate melts. Take the bowl off the heat and set aside.
• First, whisk the sugar into the chocolate mixture, then whisk in the eggs, coffee, and salt, whisking until the mixture is combined and smooth. Sprinkle on the flour and fold it in with a rubber spatula until it's incorporated.
• Pour the batter into the prepared pan and place it on a sheet pan. Bake for 30 to 40 minutes (see Cook's Note), until the top puffs up and cracks and the cake doesn't wobble when you jiggle the pan. (A toothpick will not come out clean.) Remove from the oven and cool completely on a baking rack. The cake will deflate as it cools. Run a small knife around the cake and remove the sides of the pan. Cut the cake in wedges and serve warm or at room temperature with sweetened whipped cream, vanilla ice cream, or crème fraîche.