Islak Kek: Ultra-Moist Turkish Chocolate Cake with Fudge Sauce Step-by-step instructions

Before you start

Before starting, bring the eggs and milk to room temperature for a better emulsion. Preheat the oven to 350°F (175°C) and grease a 9x13-inch baking pan. Measure all ingredients accurately, as the balance of wet to dry is crucial for the sponge's ability to absorb the sauce.

Prepare the fudge sauce ingredients and have them ready by the stove. The sauce should be made while the cake bakes so it is hot and ready to pour over the warm cake. Gather a large mixing bowl, an electric mixer, a saucepan, and a spatula. Having everything in place will make the process smooth and enjoyable.

Instructions

Batter and Bake

1. 1Whip the Eggs and Sugar
   Preheat the oven to 350°F (175°C). Grease a 9x13-inch baking pan. In a large bowl, beat the eggs and sugar with an electric mixer on high speed until pale, thick, and tripled in volume, about 3 to 4 minutes. The mixture should fall in a thick ribbon when the beaters are lifted.
   Look for The egg mixture is pale, thick, and leaves a ribbon that holds for a few seconds.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Make sure the eggs are at room temperature for maximum volume.
2. 2Add the Wet Ingredients
   With the mixer on low speed, slowly pour in the milk and vegetable oil. Mix until just combined. The mixture may look slightly separated, but that is fine. Scrape down the sides of the bowl with a spatula.
   Look for The liquid is incorporated, though the batter may look a little thin.
   Tip Do not overmix; the batter will come together once the dry ingredients are added.
3. 3Whisk in the Dry Ingredients
   Sift the flour, cocoa powder, and baking powder over the wet mixture. Gently fold with a spatula or whisk on low speed until no streaks of flour remain. The batter will be smooth and slightly runny.
   Look for The batter is smooth, glossy, and free of lumps.
   Tip Sifting aerates the flour and cocoa, making the cake lighter.
4. 4Bake the Sponge
   Pour the batter into the prepared pan and smooth the top. Bake for 25 to 30 minutes, until a toothpick inserted in the center comes out with a few moist crumbs. The cake should spring back when lightly pressed. Let cool in the pan for 5 minutes.
   Look for The cake is risen, the edges pull away slightly, and a toothpick comes out with moist crumbs.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Do not overbake; the sponge should stay moist because it will absorb the sauce.

The batter should be pale, smooth, and slightly runny, with no lumps. After baking, the cake should be risen, with a domed top and a springy texture. The edges will be slightly darker, and a toothpick inserted in the center will come out with only a few moist crumbs. The kitchen will smell of rich chocolate and vanilla. Before moving to the next phase, ensure the cake is still warm but not hot to the touch, and have the fudge sauce ready on the stove.

Soak with Fudge Sauce

5. 5Simmer the Fudge Sauce
   While the cake bakes, combine the milk, sugar, cocoa powder, and butter in a medium saucepan. Place over medium heat and whisk constantly until the butter melts and the mixture comes to a gentle simmer. Cook for 2 to 3 minutes, until slightly thickened.
   Look for The sauce is smooth, dark, and coats the back of a spoon.
   Tip Whisk constantly to prevent scorching on the bottom.
6. 6Pour the Sauce Over the Warm Cake
   While the cake is still warm, poke holes all over the top with a skewer or fork. Slowly pour the hot fudge sauce evenly over the cake, making sure to cover every inch. Let it sink in for a few minutes.
   Look for The sauce pools on top and gradually seeps into the holes.
   Tip Pour slowly so the sauce has time to absorb into the sponge.
7. 7Let the Cake Absorb the Sauce
   Allow the cake to rest for at least 10 minutes so the sauce fully saturates the sponge. The top will become glossy and dark. The cake may look very wet, but that is the signature of Islak Kek.
   Look for The surface is shiny, and the cake feels heavy and moist.
   Tip The longer it rests, the more evenly the sauce distributes.

The fudge sauce should be smooth, dark, and glossy, with a consistency similar to heavy cream. When poured over the cake, it should sizzle slightly and immediately begin to seep into the holes. The top of the cake will turn a deep, shiny brown. After resting, the sauce should be mostly absorbed, leaving a thin, sticky layer on top. The cake should feel heavy and look almost wet. Before moving on, check that the sauce has not pooled excessively in any one spot; if it has, tilt the pan to distribute it.

Finish and Serve

8. 8Top with Pistachios
   Sprinkle the crushed pistachios evenly over the top of the cake. Press them gently so they stick to the glossy surface. The pistachios add a vibrant green contrast and a subtle crunch.
   Look for The pistachios cover the surface in an even layer.
   Tip Add the pistachios just before serving to keep them crunchy.
9. 9Slice and Serve
   Cut the cake into squares or rectangles. Use a spatula to lift each piece, letting any excess sauce drip back into the pan. Serve at room temperature or slightly warm, with extra sauce spooned over each slice if desired.
   Look for Each slice is deeply soaked, dark, and glossy.
   Tip A sharp knife dipped in hot water makes clean cuts.

The cake should be deeply soaked, with a dark, glossy surface. The crushed pistachios should be evenly scattered, adding a bright green and brown contrast. When sliced, the crumb should be dense and moist, with visible sauce in every pore.

The cake should hold its shape but feel almost fudgy. Serve at room temperature or slightly warm for the best flavor. The aroma should be intensely chocolatey, with a hint of toasted nuts. Before serving, check that the slices are clean and the sauce is not dripping excessively.

Common mistakes

One common mistake is overbaking the sponge, which dries it out and prevents it from absorbing the sauce properly. Watch the cake closely and start checking at 25 minutes. Another issue is pouring the sauce over a completely cooled cake; the sauce will run off instead of soaking in.

Make sure the cake is still warm when you pour the sauce. Also, avoid using a pan that is too small, as the batter may overflow. Finally, do not skip poking holes in the cake before adding the sauce; this helps the liquid penetrate deeply. If the sauce is too thick, it may not soak in well; it should be pourable but not watery.

How to tell it’s done

The cake is done when a toothpick inserted into the center comes out with a few moist crumbs attached, not wet batter. The top should spring back when lightly pressed, and the edges will start to pull away from the pan. The internal temperature of the cake should reach at least 160°F (71°C) to ensure the eggs are fully cooked.

After the sauce is poured, the cake should look glossy and feel heavy with liquid. When sliced, the crumb should be dark, moist, and thoroughly soaked, with no dry patches. The sauce should have been fully absorbed, leaving a thin, shiny layer on top.

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