Moist Chocolate Walnut Cake Recipe for Perfectly Soft Layers

Moist milk chocolate cake infused with black walnut and finished with a fluffy chocolate-walnut buttercream, this Chocolate Walnut Cake is a true treat. It pairs perfectly with coffee or tea and makes a lovely dessert for any special occasion.

Black walnut offers a slightly retro, distinctive flavor that pairs beautifully with chocolate. While many desserts today range from red velvet to every shade of chocolate, the classic chocolate-and-walnut combination remains timeless and delicious.

This cake carries that nutty profile through every layer, including the frosting, and the chopped walnuts on top add a welcome crunch. If you enjoy rich, bakery-style chocolate cakes, this recipe—similar in richness to my Chocolate Cinnamon Cake—will be right up your alley.

🌰 Why you’ll love this chocolate nut cake

• Exceptionally moist: Tender crumb that highlights every flavor.
• Milk chocolate-forward: Both cake and frosting showcase milk chocolate notes.
• Crowd-pleaser: Black walnut’s bold, nutty character pairs wonderfully with chocolate and often surprises people in the best way.

🍴 Equipment

I bake layer cakes in a sheet pan and cut rounds with cake rings, but you can use round pans if you prefer. A cake ring set and a ¼ sheet pan are handy for the 1x batch described here.

📋 Ingredients

This recipe uses a simple two-bowl method—no advanced techniques are required. The ingredients below are chosen to produce consistently moist, tender cake layers.

Dry ingredients (whisk together in a medium bowl):

• All-purpose flour
• Baking powder
• Baking soda
• Salt
• Instant Clearjel (or instant pudding mix as a substitute)
• Unsweetened cocoa powder
• Sugar and brown sugar

Wet ingredients (whisk together in a large bowl):

• Large eggs
• Buttermilk
• Water (or brewed coffee for deeper chocolate flavor)
• Vegetable oil
• Vanilla extract
• Black walnut extract
• Apple cider vinegar (added just before baking)
• Melted salted butter (added at the end for gloss and moisture)
• Chopped walnuts

For the milk chocolate walnut buttercream, whip together cream cheese, salted butter, butter-flavored shortening, powdered sugar, cocoa powder, Instant Clearjel, vanilla, and black walnut extract until light and fluffy. Decorate with a chocolate ganache drizzle, additional walnuts, and optional chocolate curls for a polished finish.

🥣 Instructions

Below are the streamlined steps for baking, frosting, and assembling this cake. Refer to the recipe card for precise measurements and bake times.

1. Preheat oven to 325°F. Line a 1″ tall ¼ sheet pan with parchment and lightly spray the parchment and sides.

2. Sift or whisk the dry ingredients (except brown sugar) in a large bowl, then add the brown sugar and combine. Whisk wet ingredients in a separate bowl until smooth.

3. Pour wet into dry, then immediately add apple cider vinegar to activate the leavening. Whisk until combined, then whisk in the melted butter. Fold in most of the chopped walnuts, reserving a few tablespoons for the top.

4. Pour batter into the prepared pan, smooth it, sprinkle the reserved walnuts across the top, and bake on the middle rack for 22–26 minutes, or until a toothpick comes out with just a few moist crumbs. Cooling times may vary by oven or batch size.

5. Cool the cake completely. For easiest cutting and layering, chill or freeze the cake for a few hours, then cut rounds with cake rings or slice as desired.

6. Make the buttercream: combine powdered sugar, cocoa, and Instant Clearjel. Beat softened cream cheese until smooth, add room-temperature salted butter, then the shortening, and mix until smooth. With the mixer on low, gradually add the sugar mixture, then vanilla and black walnut extract. Beat on high 2–3 minutes until light and fluffy. The frosting will thicken slightly as it rests.

7. Layer the cake with buttercream between each layer. Apply a thin crumb coat, chill briefly to set, then finish with a final coat of buttercream. Add a ganache drizzle, pipe rosettes if desired, and garnish with chopped walnuts and chocolate curls.

8. Serve at room temperature for best texture. If refrigerated, allow the cake to come back to room temperature for 2–3 hours before serving.

🧁 Variations

Try these simple tweaks to change the flavor profile:

• Replace black walnut extract with 1 tsp cinnamon in a 1x batch for a chocolate-cinnamon-walnut version.
• For a subtler walnut note, omit the extract and use brewed coffee instead of water in the batter; add a tablespoon of brewed coffee to the buttercream.
• Swap walnuts for pecans or another preferred nut.
• Add 1 tbsp espresso powder, a half cup of bittersweet chips, or use dark cocoa powder for deeper chocolate flavor.

Yield examples for a 1x batch: one 6″ three-layer cake (cut from a ¼ sheet pan), 18 cupcakes, or other pan configurations listed in the recipe card.

🧊 Storage

This cake is best at room temperature. Leftover slices can sit at room temperature up to 24 hours; after that, store them airtight in the refrigerator. For longer storage, freeze cake layers for up to two weeks before assembling. Buttercream can be made 2–3 days ahead and refrigerated—bring to room temperature and rewhip briefly before using.

💭 FAQ

More Chocolate & Nutty Cake Recipes

If you like this cake, you may enjoy other moist chocolate layer cakes with nutty or complementary flavors.

Did you make this cake? Tag @amycakesbakes in your photos on Instagram and consider subscribing for more bakery-style recipes for moist cakes, pies, and cookies.

Thanks for reading. ❤️

📖 Recipe & Step-by-Step Instructions