In the throes of the Depression era, when resources were scarce and creativity was key, emerged a culinary gem that has stood the test of time: the Depression-era oil cake. Born out of necessity, this humble yet resilient cake has earned its place as a timeless classic. Its simplicity is deceptive; it’s not just a cake, but a symbol of resilience and ingenuity. At its core, this cake boasts a delightful lightness and moistness, qualities attributed to the clever use of oil instead of butter.
The genius behind the Depression-era oil cake lies in its use of oil, a departure from traditional butter-cake recipes. This substitution not only made the cake more affordable during times of economic hardship but also contributed significantly to its remarkable texture. Oil brings a unique tenderness to the crumb, locking in moisture and lending the cake its signature softness. Unlike butter, which solidifies at cooler temperatures, oil remains fluid, ensuring a consistently moist and airy cake.
While honoring tradition, infusing new life into a Depression-era oil cake can be an exciting venture. One such innovative twist involves the enchanting fusion of rosemary and chocolate. The marriage of the earthy, pine-like aroma of rosemary with the deep, indulgent richness of chocolate creates a symphony of flavors that elevates the classic oil cake to new heights. The fragrant, herbaceous notes of rosemary harmonize unexpectedly yet beautifully with the intense sweetness of chocolate, offering a sophisticated and tantalizing taste experience.
Experimenting with flavors not only breathes new life into age-old recipes but also pays homage to the culinary inventiveness of our ancestors. The introduction of rosemary and chocolate into the Depression-era oil cake is a testament to the enduring nature of culinary traditions, showcasing their adaptability to contemporary palates. It’s a reminder that innovation and respect for tradition can coexist harmoniously in the realm of baking, allowing us to savor the best of both worlds.
In essence, the Depression-era oil cake, with its resilience in the face of adversity, continues to inspire a new generation of bakers. Its simple yet sophisticated nature serves as a canvas for creativity, inviting us to explore and reimagine flavors while preserving the essence of a bygone era. Embracing the unexpected combination of rosemary and chocolate in this timeless classic not only revitalizes tradition but also invites us to embark on a flavorful journey that bridges the past and the present.
Chocolate Rosemary Layer Cake
Notes
You’ll need:
- 3, 8-inch cake pans
- Parchment paper
- Baking spray with flour
- Small and Medium saucepan
- Small, Medium, and Large mixing bowls
- Glass measuring pitcher
- Hand mixer or stand mixer with paddle attachment
- Ladle or Scoop, optional
- Straight spatula for frosting. An offset spatula is optional
- Squeeze bottle or piping bag for chocolate drip
Ingredients
- Chocolate Rosemary Cake
- • 3 ½ cups (827 g) water
- • 6 sprigs (2 – 3 inches long each) fresh cut rosemary
- • ¾ cup (70 g) cocoa powder
- • 2 ¾ cups (626 g) granulated sugar
- • 3 cups +2 tbsp (383 g) all-purpose flour
- • 1 ½ cups (170) cake flour
- • 3 tsp baking soda
- • 1 ½ tsp salt
- • 1 cup (215 g) canola oil
- • 3 tsp white vinegar
- • 3 tsp vanilla
- • 1 cup (170 g) semi-sweet chocolate chips
- Chocolate American Buttercream
- • 1 cup (100 g) cocoa powder sifted
- • 2 cups (226 g) unsalted butter, softened
- • ¼ cup heavy whipping cream
- • 2 tsp vanilla
- • 1 tsp kosher salt
- Chocolate Rosemary Ganache
- • 1 ½ cups (360 g) heavy whipping cream
- • 6 – 8 sprigs of fresh rosemary
- • 1 ½ cups (255 g) semi-sweet chocolate, coarsely chopped
- • ¼ cup (57 g) light corn syrup – optional
Instructions
- Chocolate Rosemary Cake
- Preheat oven to 350℉. Spray three 8-inch cake pans with baking spray and line with parchment paper just on the bottom. Set aside.
- In a small saucepan, bring water to a boil and immediately turn off the heat and add the 6 sprigs of fresh rosemary. Cover and let stand for 10 minutes. Discard the rosemary sprigs when the water is fragrant.
- In a medium bowl, sift the cocoa. Pour the hot rosemary-infused water over the cocoa powder and stir until combined. Set this mixture aside.
- In a separate large bowl, sift together both flours, sugar, baking soda, and salt. Set this aside.
- Add the oil, vinegar, and vanilla to the chocolate mixture and stir until combined. Pour the chocolate mixture into the bowl of dry ingredients. Using a large whisk, stir until combined. (without adding any air, the whisk is to try and get rid of any big lumps) There could be some small lumps, but make sure there are no pockets of dry ingredients.
- Using a ladle or scoop, divide the batter among the prepared pans (about 1/3 full). Bake for about 30 minutes or until a skewer comes out clean.
- Cool in the pans on a wire rack for 10 minutes. Carefully invert onto the cooling rack and pull off the parchment paper. Cool for 10 more minutes before flipping the cakes over to finish cooling. Let cool completely.
- Can be made ahead, wrap the cakes in cling film and keep cold in the refrigerator.
- Chocolate American Buttercream
- In the bowl of a stand mixer with a paddle attachment, add the softened unsalted butter.
- Cream with the paddle until soft, lighter in color, and fluffy.
- Stop the paddle, add all of the powdered sugar, cocoa powder and salt, and pulse on LOW, until the dry ingredients disappear completely.
- In a small measuring pitcher, add the heavy whipping cream and vanilla. Slowly add this to the butter/sugar/cocoa mixture until the texture is smooth and glossy.
- Chocolate Rosemary Ganache
- Heat the cream until steaming, but not boiling. Remove from the heat, add rosemary sprigs and cover, let steep for 10 minutes. Discard the rosemary sprigs once the heavy cream is fragrant.
- Heat the rosemary cream until very warm and pour over chopped chocolate in a small heat-proof bowl.
- Let the mixture stand until the chopped chocolate is soft. Stir until it is smooth. (you can heat this up in the microwave in 5 – 10 second bursts if there are still chunks of chocolate, stir until completely smooth)
- Stir in the corn syrup for a super shiny finish, and pour into a squeeze bottle or piping bag.
- Fill another large piping bag (without a tip, just cut a ½ inch opening or use a 1M piping tip) with the Chocolate Buttercream.
- Assembly
- Level the cake layers and place one on a cake board or cake stand. Using the piping bag, frost each layer evenly, and repeat with the next layer. Top with the third cake layer upside down to minimize crumbs. Crumb coat the entire cake in buttercream and chill in the fridge for at least 30 minutes.
- Cover the chilled cake in a final coat of buttercream and smooth until you have the whole cake evenly covered in frosting, trying to keep the top edge as sharp as possible. Chill the cake in the fridge until firm, about 30 minutes.
- With a chilled cake, use a piping bag or a spoon to drip ganache around the edge of the cake. Start with a test drip on the back of the cake to make sure it is at the right temperature and consistency. The drip should go no further than halfway. If it’s too hot, wait. If it’s too cool, you can try and blast it in the microwave for a couple of seconds. Fill in the top of the cake with extra ganache and chill in the fridge for 15 minutes.
- Optional: Top the cake with a wreath of fresh rosemary.



