These espresso cupcakes pair tender chocolate cake with brewed espresso and a smooth coffee buttercream, inspired by the cupcake-and-coffee-shop combination suggested by “Cupcake Espresso Bar Moreno Valley.” They are a homemade recipe, not a claim about a particular local business, and the espresso deepens the chocolate flavor without making the cupcakes taste bitter.
Ingredients
- 1 cup (125 g) all-purpose flour
- ½ cup (45 g) unsweetened cocoa powder, preferably natural cocoa
- ¾ cup (150 g) granulated sugar
- ½ teaspoon baking soda
- ½ teaspoon baking powder
- ¼ teaspoon fine salt
- 1 large egg, at room temperature
- ½ cup (120 ml) buttermilk, at room temperature
- ¼ cup (60 ml) neutral oil, such as canola
- 1 teaspoon (5 ml) vanilla extract
- ½ cup (120 ml) hot brewed espresso or strong coffee
- 1 tablespoon (6 g) instant espresso powder, divided
- ½ cup (113 g) unsalted butter, softened
- 2 cups (240 g) powdered sugar, sifted if lumpy
- 1 tablespoon (15 ml) milk or cream, plus more as needed
- Pinch of fine salt for the frosting
- 12 chocolate-covered espresso beans, optional, for garnish
Instructions
- Heat the oven to 350°F (175°C). Line a standard 12-cup muffin pan with paper liners. Let the hot espresso cool for a few minutes; it should be warm rather than steaming when added to the batter. Stir 2 teaspoons of the instant espresso powder into it until dissolved, reserving the remaining teaspoon for the frosting.
- In a medium bowl, whisk together the flour, cocoa powder, sugar, baking soda, baking powder, and ¼ teaspoon salt. Break up any cocoa lumps so the dry mixture is even.
- In a second bowl, whisk the egg, buttermilk, oil, and vanilla until smooth. Pour the wet mixture into the dry ingredients and stir gently just until no large streaks of flour remain. Add the warm espresso and fold until the batter is evenly combined. It will be thin; avoid beating it, which can make the cakes dense.
- Divide the batter among the liners, filling each about two-thirds full. Bake for 18–20 minutes, until the tops spring back lightly and a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. A cupcake is not a custard-style egg dish; do not use the egg-dish temperature rule for it. The cake should be fully baked, with no raw batter remaining.
- Cool the cupcakes in the pan for 5 minutes, then transfer them to a wire rack. Cool completely, about 25–30 minutes, before frosting; warm cakes will melt the buttercream.
- Make the frosting while the cakes cool. Beat the softened butter in a bowl with an electric mixer for 1–2 minutes, until creamy. Dissolve the remaining 1 teaspoon espresso powder in the tablespoon of milk or cream. Beat this into the butter along with a pinch of salt.
- Add the powdered sugar in two or three additions, mixing on low at first to prevent a cloud of sugar. Once incorporated, beat on medium for 1–2 minutes until fluffy. If it is too stiff to spread, add milk a teaspoon at a time; if too soft, beat in a little more powdered sugar.
- Spread or pipe the frosting onto the completely cooled cupcakes. Add an espresso bean to each, if using, and serve. Allow roughly 10 minutes for mixing the frosting and finishing the cakes. The stated total includes baking, cooling, and finishing time.
Tips
- Measure flour by spooning it into the cup and leveling the top, or weigh it. Scooping directly with a measuring cup can pack in extra flour and produce dry cupcakes.
- No espresso machine is needed: use strong drip coffee, or dissolve 1 tablespoon (6 g) instant espresso powder in ½ cup (120 ml) hot water. Regular strong coffee gives a milder coffee note.
- Bring the egg and buttermilk toward room temperature before mixing. Cold ingredients can make the batter clump and may affect how evenly the cupcakes bake.
- Do not frost before the cakes cool, and do not overmix after adding the flour. Both steps help preserve a tender crumb and neat frosting.
Serving Suggestions
Serve at room temperature with freshly brewed coffee, a latte, or a glass of cold milk. For a dessert plate, add berries or sliced strawberries to bring a tart contrast to the chocolate and coffee. If serving a group, set out the cupcakes unfrosted and pipe the buttercream shortly before dessert so the tops stay tidy.
Variations
For a stronger coffee flavor, add another ½ teaspoon instant espresso powder to the dissolved espresso in the batter; avoid adding extra liquid. For mocha cupcakes, fold ½ cup (85 g) mini chocolate chips into the finished batter. You can also replace the chocolate-covered bean garnish with a light dusting of cocoa or finely grated chocolate.
To make a dairy-free version, use an unsweetened plant-based milk soured with 1½ teaspoons lemon juice in place of buttermilk, and use a firm plant-based baking stick instead of butter. Results vary by product, so choose one intended for baking rather than a soft spread. For a less sweet finish, use a thin layer of frosting rather than reducing the powdered sugar substantially, since sugar provides structure.
Storage and Reheating
Because the buttercream contains dairy, refrigerate frosted cupcakes within 2 hours of serving. Store them in an airtight container in the refrigerator for up to 3 days. Let them sit at room temperature for about 20–30 minutes before serving so the cake and frosting soften; cupcakes are best served at room temperature, so reheating is unnecessary.
Unfrosted cupcakes can be kept in an airtight container at room temperature for up to 2 days, or frozen for up to 2 months. Freeze them in a single layer until firm, then wrap or seal well; thaw overnight in the refrigerator or for a few hours at room temperature, and frost after thawing. Do not leave perishable frosted cupcakes out for more than 2 hours, or 1 hour in temperatures above 90°F (32°C).
Frequently Asked Questions
Can I make these cupcakes without espresso?
Yes. Replace the espresso with the same amount of hot water for chocolate cupcakes with a subtler flavor. Coffee mainly reinforces the cocoa; it is not required for the batter to rise.
Can I use brewed coffee instead of espresso?
Yes. Use strong brewed coffee in the same quantity. The coffee flavor may be less concentrated, so adding the optional extra ½ teaspoon instant espresso powder is a practical way to strengthen it.
Why did my cupcakes sink in the middle?
Common causes include opening the oven early, using expired baking powder or soda, overfilling the liners, or underbaking. Check the centers with a toothpick and keep the oven door closed until near the end of the baking time.
Can I prepare the batter ahead?
It is better to bake the batter soon after mixing because the leaveners begin working once wet ingredients are added. Bake the cupcakes ahead instead, cool them fully, and frost them the day you plan to serve them.
Can I make mini cupcakes?
Yes. Fill mini liners about two-thirds full and begin checking after 9–11 minutes, since their smaller size changes the baking time. The recipe will yield more than 12 minis; use the toothpick test rather than relying only on the clock.
How can I tell when the cupcakes are done?
The tops should spring back lightly when touched, and a toothpick inserted in the center should come out without wet batter. A few moist crumbs are fine. Let the cakes cool completely before adding frosting.
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