German Chocolate Cake with Coconut Pecan Frosting
Photo by Polina Tankilevitch on Pexels

German Chocolate Cake with Coconut Pecan Frosting

From the MyKitchenBank Kitchen

Three tender, buttermilk-rich chocolate layers lightened with whipped egg whites, filled and topped with a classic cooked caramel-like frosting loaded with toasted pecans and sweet coconut.

Prep
55 min
Cook
50 min
Wait
1 hr 35 min
Total
3 hr 20 min
Makes
1 three-layer 9-inch cake (12 slices)

Steps

Before you start
  • Set out the butter, buttermilk, and all 8 eggs 1 hour ahead so they come to room temperature (about 68°F/20°C). Separate the eggs while cold, then let the yolks and whites warm up.
  • You need 4 yolks and 4 whites for the cake plus 4 more yolks for the frosting, so 8 eggs in all; keep the 4 cake yolks and 4 frosting yolks in separate bowls.
  • Make sure your mixing bowl and whisk are completely grease-free, or the egg whites will not whip properly.
  • Plan the timing: the frosting is cooked while the cakes cool, and it needs about 45 minutes to cool and thicken before you can spread it.
  1. Toast the pecansOven 350°F / 175°C

    • Heat the oven to 350°F (175°C) with a rack in the middle.
    • Spread the 1½ cups chopped pecans on a rimmed baking sheet and toast for 8 minutes, stirring once halfway, until fragrant and a shade darker.
    • Tip them onto a plate to stop the cooking.
    • Leave the oven on.
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    Ready when: Pecans smell nutty and are lightly browned at the edges

    Tip: Pecans burn quickly; set a timer and don't walk away after minute 6.

  2. Prep pans, melt chocolate

    • Grease the bottoms and sides of three 9-inch (23 cm) round pans with the 1 tbsp softened butter, line the bottoms with parchment circles, and grease the parchment lightly.
    • Put the chopped chocolate in a medium heatproof bowl, pour the ½ cup boiling water over it, let sit 1 minute, then whisk until completely smooth.
    • Set aside to cool to lukewarm while you continue.
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    Ready when: Chocolate mixture is glossy and smooth

    Tip: Hot chocolate would scramble the egg yolks in the next step, so make sure it is only lukewarm.

  3. Cream butter and sugar

    • In a large bowl, beat the 1 cup room-temperature butter and 1½ cups (300 g) of the cake sugar on medium-high speed for 3 to 4 minutes until pale and fluffy.
    • Beat in the 4 cake yolks one at a time, scraping the bowl after each.
    • Beat in the 2 tsp vanilla, then the cooled chocolate mixture on low speed until evenly combined and no streaks remain.
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    Ready when: Butter mixture is pale, light, and noticeably increased in volume

    Tip: Measure out ½ cup (100 g) of the sugar now and set it aside for the egg whites.

  4. Alternate flour and buttermilk

    • Whisk the flour, baking soda, and ½ tsp salt together in a bowl.
    • With the mixer on low, add the flour mixture in 3 additions alternating with the buttermilk in 2 additions, starting and ending with flour.
    • Mix just until each addition disappears into the batter.
    • The batter will be thick and smooth.
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    Ready when: No dry flour streaks remain and the batter is smooth

    Tip: Overmixing develops gluten and makes the cake tough, so stop as soon as it is combined.

  5. Whip and fold whites

    • In a clean, dry bowl with clean beaters, beat the 4 egg whites on medium speed until foamy, then gradually add the reserved ½ cup (100 g) sugar.
    • Increase to high and beat 3 to 4 minutes until stiff, glossy peaks form.
    • Stir one-third of the whites into the batter to lighten it, then gently fold in the rest with a spatula, scooping from the bottom, until no white streaks remain.
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    Ready when: Whites hold a stiff peak when the beater is lifted, and the folded batter is uniformly brown and airy

    Tip: Fold gently; stirring hard deflates the whites and gives dense layers.

  6. Bake the layersOven 350°F / 175°C

    • Divide the batter evenly among the three pans (about 590 g each if you weigh it) and smooth the tops.
    • Bake at 350°F (175°C) for 28 to 32 minutes, rotating the pans halfway through if your oven is uneven, until a toothpick in the center comes out clean or with a few dry crumbs.
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    Ready when: Tops spring back when lightly pressed and edges just start to pull away from the pan

    Tip: Avoid opening the oven in the first 20 minutes so the layers don't sink.

  7. Cool the layers

    • Cool the cakes in their pans on wire racks for 10 minutes.
    • Run a thin knife around the edges, turn each layer out onto a rack, peel off the parchment, and let cool completely, about 50 more minutes, until no warmth remains when you touch the bottoms.
    • Start the frosting while they cool.
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    Ready when: Layers feel completely cool to the touch

    Tip: Frosting a warm cake makes the layers slide and the frosting turn greasy.

  8. Cook the frosting base

    • In a heavy 3-quart saucepan, whisk together the evaporated milk, frosting sugar, 4 beaten yolks, butter pieces, and ¼ tsp salt.
    • Cook over medium heat, stirring constantly with a heatproof spatula and scraping the bottom and corners, for 10 to 12 minutes until the mixture reaches 170°F (77°C), turns golden, and coats the back of a spoon.
    • It will bubble gently at the edges.
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    Ready when: Thickened, golden, 170°F (77°C), and a finger drawn across the back of the spoon leaves a clean line

    Tip: Don't walk away or turn the heat up; the yolks can scramble or scorch on the bottom.

  9. Finish and cool frosting

    • Remove the pan from the heat and stir in the vanilla, toasted pecans, and shredded coconut.
    • Scrape into a bowl and let cool for 45 minutes at room temperature, stirring every 10 to 15 minutes, until thick and spreadable like soft peanut butter.
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    Ready when: Frosting is thick, no longer hot, and holds a mound on the spoon

    Tip: If it's still runny after 45 minutes, chill it 10 minutes and stir; if too stiff, stir in a splash of evaporated milk.

  10. Assemble the cake

    • Level the layers with a serrated knife if domed.
    • Place one layer on a serving plate and spread with one-third of the frosting (about 1 cup), almost to the edge.
    • Repeat with the second layer and frosting, then top with the third layer and the remaining frosting, spreading it to the edge.
    • Traditionally the sides are left unfrosted.
    • Let the cake sit 20 minutes before slicing with a sharp knife wiped clean between cuts.
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    Ready when: Layers are stacked evenly with a thick, even frosting layer between each

    Tip: Slide strips of parchment under the bottom layer to keep the plate clean.

Good to know

Tips
  • Weigh the flour (312 g) if you can; scooped flour can add up to 1/2 cup extra and give a dry cake.
  • Stir the frosting constantly and scrape the corners of the pan so it cooks evenly without scorching.
  • Stir the toasted pecans and coconut in off the heat so they stay crunchy and don't turn greasy.
  • For neat slices, chill the finished cake for 30 minutes first, then cut with a hot, dry knife.
Make ahead

Bake the layers up to 1 day ahead, cool completely, wrap each tightly in plastic, and keep at room temperature. The frosting can be made up to 3 days ahead and refrigerated; let it sit at room temperature 30 minutes and stir before spreading. Layers can also be frozen up to 2 months.

Storage & reheating

Room temperature: up to 2 hours for serving. Fridge: cover and refrigerate up to 4 days because of the egg-yolk and evaporated milk frosting; let slices sit 30 minutes at room temperature before serving. Freezer: freeze unfrosted layers up to 2 months, or wrapped slices up to 1 month, and thaw overnight in the fridge. No reheating needed.

Substitutions
  • sweet baking chocolate (such as German's) → 3 oz (85 g) semisweet chocolate plus 1 tbsp (13 g) extra sugar added to the batter. Gives a slightly more bittersweet, less traditional flavor.
  • buttermilk → 1 cup (240 ml) milk mixed with 1 tbsp lemon juice or white vinegar, rested 5 minutes. Works well; the acid is needed to activate the baking soda.
  • pecan halves → walnuts, toasted and chopped. Slightly more bitter but still good.
  • sweetened shredded coconut → unsweetened shredded coconut plus 2 tbsp (25 g) extra sugar in the frosting. Less sweet with a more pronounced coconut flavor.

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Cuisine
American
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