Old Fashioned Cinnamon Buttercream Spice Cake

There is nothing more frustrating than cutting into a spice cake only to find it's as dry as a cracker. This usually happens when the spices absorb too much moisture, leaving you with a crumb that resembles sawdust more than cake.

I've noticed this with old-fashioned recipes that use only butter, which often makes the cake feel stiff once chilled.

The secret is combining oil and buttermilk. The oil ensures the cake stays tender for days, while the buttermilk adds a bright acidity to balance the sugar. This Cinnamon Buttercream Spice Cake is the solution for those dry, lackluster bakes.

You can expect a deep, mahogany hued sponge that smells like a crisp autumn night. The frosting is a thick, spiced cloud that complements the richness of the cake. It's a cherished classic that provides pure comfort in every bite.

Cinnamon Buttercream Spice Cake

Now, let's dive into the process. While most cakes are simple mix-and-bake affairs, this recipe utilizes a few key techniques to achieve that authentic, old-fashioned quality.

Why This Cake Works

• Pre mixed Spices: Whisking cinnamon, nutmeg, cloves, and allspice into the flour first prevents "spice pockets." This means every single bite has a consistent, warm glow.
• Buttermilk Reaction: The acid in the buttermilk reacts with the baking soda. This creates those tiny air bubbles that keep the cake light and fluffy. If you're looking for a shortcut, you can use a homemade spice cake mix to get a head start on the dry ingredients.
• Oil vs Butter: Using oil instead of creamed butter for the base ensures the cake stays moist even after a few days in the fridge.

Shopping List Details

I've found that ensuring your eggs and buttermilk are at room temperature is essential. If they're too cold, the batter may separate or appear curdled, which can hinder the cake's final rise.

For the Spice Cake

• 2 ½ cups (310g) all purpose flour
• 1 ½ cups (300g) granulated sugar
• 1 tbsp (8g) ground cinnamon
• 1 tsp (2g) ground nutmeg
• ½ tsp (1g) ground cloves
• ½ tsp (1g) ground allspice
• 1 tsp (5g) baking soda Why this? Lifts the cake and browns the crumb
• ½ tsp (3g) salt
• 2 large eggs
• ½ cup (120ml) vegetable oil Why this? Ensures consistent moisture
• 1 cup (240ml) buttermilk
• 1 tsp (5ml) vanilla extract

For the Cinnamon Buttercream

• 1 cup (225g) unsalted butter, softened
• 3.5 cups (420g) powdered sugar
• 1 tbsp (8g) ground cinnamon
• 2 tbsp (30ml) heavy cream
• 1 tsp (5ml) vanilla extract
• ¼ tsp (1.5g) salt

Tools You'll Need

Basic kitchen gear is plenty for this recipe. A few mixing bowls and a hand mixer are all you'll need. A stand mixer, like a KitchenAid, is helpful for the frosting but certainly not required.

• 9x13-inch baking pan (or two 8 inch rounds)
• Parchment paper or butter for greasing
• Wire cooling rack
• Spatula for smoothing the top
• Electric hand mixer

Baking step-by-step

I strongly suggest not rushing the cooling stage. If the cake is still slightly warm, the frosting will melt into a glaze; while tasty, that's not the intended look for a Cinnamon Buttercream Spice Cake.

Prepping the Base

1. Heat your oven to 350°F (175°C). Grease your pan with butter or line it with parchment paper.
2. In a large bowl, whisk the flour, sugar, cinnamon, nutmeg, cloves, allspice, baking soda, and salt Note: This ensures the spices are evenly spread.
3. Mix in the eggs, oil, buttermilk, and vanilla. Beat on medium speed for 2 minutes until the batter is smooth and mahogany colored.

Baking to Perfection

4. Pour the batter into the pan and flatten the surface with a spatula.
5. Bake for 35–40 minutes until a toothpick placed in the center is clean or shows only a few moist crumbs.
6. Shift the cake to a wire rack and let it cool fully.

Whipping the Frosting

7. Beat softened butter on high for 3 minutes until it looks pale ivory and fluffy.
8. Incorporate the powdered sugar one cup at a time, starting on low and then increasing to medium.
9. Stir in the cinnamon, vanilla, salt, and heavy cream.
10. Whip on high for one final minute to reach a velvety, spreadable consistency.

Fixing Common Issues

Even with a recipe as solid as this Cinnamon Buttercream Spice Cake, things can go sideways. Usually, it's a matter of temperature or over mixing.

Dense Cake Crumb

If the cake feels heavy or rubbery, you likely beat the batter too much after adding the flour. Stop the mixer as soon as the dry streaks vanish.

Curdled Frosting

When the buttercream looks separated or "broken," it's usually because the butter was too cold or the cream was too cold. Let the bowl sit at room temperature for 10 minutes, then whip it again.

Avoiding Burnt Edges

If the edges brown too fast but the middle is raw, your pan might be absorbing too much heat. Lower the oven by 10 degrees and bake for 5 minutes longer.

Easy Recipe Changes

Depending on what you have in the pantry, you can tweak this. If you want something fruitier, you could try an applesauce cake for a similar vibe but a different moisture source.

Decision Shortcuts: Extra warmth? → Add 1/2 tsp extra cloves. Lighter frosting? → Whip in 1 tbsp extra heavy cream. Deeper color? → Use dark brown sugar for half the granulated sugar.

For a different layout, you can bake this as a layer cake. Just use two 8 inch round pans and split the frosting between the middle and the top. This Cinnamon Buttercream Spice Cake also works well as cupcakes, just reduce the bake time to 18-22 minutes.

Keeping Your Cake Fresh

This cake actually tastes better on day two because the spices have more time to meld. Store the slices in a container with a tight lid in the fridge for 3 to 5 days.

For long term storage, wrap individual slices in foil and freeze them for up to 3 months. To eat, let a slice thaw in the fridge overnight or microwave it for 15 seconds if you like it warm.

To avoid waste, don't throw away the leftover frosting. It's great as a dip for apple slices or stirred into a morning bowl of oatmeal for a treat.

Serving and Styling

When it comes to presenting this Cinnamon Buttercream Spice Cake, keep it rustic. Use a fork to create swirls in the frosting rather than a perfectly smooth finish. This gives it that home baked, nostalgic look.

For a final touch, sprinkle a little extra cinnamon on top or place a few cinnamon sticks around the platter. If you're serving it for a brunch, a side of fresh raspberries or sliced pears adds a nice brightness to the rich, spiced flavors.

Right then, that's it. You've got a moist, spiced sponge and a fluffy frosting that doesn't break. Enjoy every bite of this classic.