Ultimate 1 Cup Sugar Chocolate Cake with Hot Fudge Sauce Step-by-step instructions

Before you start

Before starting, preheat the oven to 350°F (175°C) and grease a 9x13-inch glass baking dish with butter. Gather all the ingredients for the cake and the sauce. Measure the flour, cocoa, and baking powder, and have the eggs, milk, and oil at room temperature for best results.

Chop the dark chocolate for the sauce and crush the pistachios if not already crushed. Set aside a saucepan for the sauce and a skewer or fork for poking holes in the cake.

Instructions

Batter and Bake

1. 1Prepare the Batter
   Preheat the oven to 350°F (175°C). Grease a 9x13-inch glass baking dish with butter. In a large bowl, beat the eggs with the granulated sugar until frothy and slightly pale. Add the milk, vegetable oil, cocoa powder, vanilla extract, baking powder, and all-purpose flour. Whisk until the batter is smooth and no lumps remain.
   Look for The batter should be glossy and pourable, with a rich chocolate aroma.
   Tip Beating the eggs and sugar first creates a lighter crumb. Do not overmix after adding flour.
2. 2Bake the Cake
   Pour the batter into the prepared baking dish and smooth the top. Bake for 25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. The cake should be fluffy and spring back when lightly pressed.
   Look for The cake will rise and pull away slightly from the edges; the top will look set.
   Tip Rotate the dish halfway through baking for even browning. Do not overbake or the cake will be dry.

At the end of this phase, the batter should be smooth and glossy, with a rich chocolate aroma. The cake will be golden on top and spring back when touched.

A toothpick inserted in the center should come out with a few moist crumbs. The cake should have risen evenly and pulled away from the sides of the dish. The kitchen will smell of chocolate and vanilla.

Sauce and Soak

3. 3Make the Chocolate Sauce
   While the cake bakes, combine the milk, sugar, oil, cocoa powder, and chopped dark chocolate in a saucepan. Cook over medium heat, stirring constantly, until the chocolate melts and the sauce is glossy and slightly thickened. Bring to a gentle simmer and then remove from heat.
   Look for The sauce should coat the back of a spoon and smell intensely chocolatey.
   Tip Stir constantly to prevent scorching. The sauce will thicken slightly as it cools.
4. 4Soak the Warm Cake
   Remove the cake from the oven and let it cool for 5 minutes. While still warm, slice the cake into 12 squares directly in the dish. Use a skewer or fork to poke holes all over the cake, reaching to the bottom. Pour the hot chocolate sauce evenly over the entire surface, letting it soak into every crevice.
   Look for The cake will darken as the sauce seeps in; the surface should look glistening and saturated.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Pour the sauce slowly to allow maximum absorption. Use a spatula to spread it to the edges.

The sauce should be smooth, glossy, and slightly thickened, with a deep chocolate color. When poured over the warm cake, it should sizzle and seep into the holes, darkening the surface. The cake will look saturated and glistening, with the sauce pooling at the edges. The texture should be moist and fudgy, not dry or soggy.

Garnish and Serve

5. 5Garnish and Serve
   Sprinkle the crushed pistachios evenly over the top of the soaked cake. Let the cake sit for at least 10 minutes so the sauce sets slightly. Serve warm or at room temperature, lifting each square with a spatula to show the fudgy, syrup-laden crumb.
   Look for The pistachios add a green crunch against the dark, glossy surface.
   Tip For extra indulgence, serve with a scoop of vanilla ice cream or a drizzle of cream.

After garnishing with pistachios, the top should be a beautiful contrast of dark chocolate and bright green nuts. The cake should be set enough to lift cleanly with a spatula, showing a fudgy, syrup-laden crumb. The aroma is intensely chocolatey with a hint of nuttiness. Serve warm or at room temperature for the best texture.

Common mistakes

One common mistake is overmixing the batter, which can develop gluten and make the cake tough. Mix just until the flour is incorporated. Another is overbaking, which dries out the cake and prevents it from absorbing the sauce properly.

Be careful not to pour the sauce over a cake that is too hot, as it may curdle; let it cool for 5 minutes. Also, do not skip poking holes in the cake—this is essential for the sauce to penetrate deeply. Finally, use a hot sauce, not a cold one, for maximum absorption.

How to tell it’s done

The cake is done when a toothpick inserted in the center comes out with a few moist crumbs, not wet batter. The top should be golden and spring back when lightly pressed. The cake will pull away from the edges of the dish slightly.

Baking time is about 25 minutes, but ovens vary, so start checking at 20 minutes. The sauce is ready when the chocolate is fully melted and the mixture is smooth and glossy. It should be hot and pourable when poured over the cake.

• Egg dishes: 160°F (71°C) in the thickest part