This Easy Irish Coffee Cake Recipe makes a moist, tender 9-inch square cake with brewed coffee, rich sour cream, a buttery cinnamon streusel, and a simple coffee glaze. It takes about 20–25 minutes to prepare, bakes in 35–45 minutes, and serves approximately 9 generous pieces.
The flavor is warmly spiced, buttery, and lightly coffee-forward without being overwhelming. Optional Irish whiskey in the batter and glaze adds classic Irish coffee character, while the cake remains delicious when made alcohol-free.
Jump to RecipeWhy You’ll Love This Recipe
This cake brings together the best parts of a classic coffee cake: a soft, sour-cream-rich crumb, a generous cinnamon topping, and a sweet glaze that melts into the ridges of the streusel. Brewed coffee deepens the flavor of the cake, giving it a pleasant roasted note that pairs beautifully with brown sugar and cinnamon.
The recipe is simple enough for a relaxed weekend bake but pretty enough for brunch, afternoon tea, or a holiday dessert table. Since it bakes in a square pan, every piece gets an inviting layer of streusel and a neat drizzle of glaze.
For another comforting dessert with a different flavor profile, you can also try this peanut butter cake. Both cakes are dependable, home-style treats that are easy to portion and share.
Ingredients You’ll Need
The cake batter relies on everyday pantry staples, but each ingredient has an important job. Sour cream supplies moisture and gentle tang, while softened butter and sugar create the light base needed for a tender crumb.
- Flour: All-purpose flour provides structure for both the cake and streusel.
- Coffee: Use strong brewed coffee and cool it completely before mixing it into the batter.
- Sour cream: Full-fat sour cream gives the cake its especially moist texture.
- Butter: Softened butter creams properly with the sugar; melted butter is used separately for the streusel.
- Irish whiskey: This is optional, but one to two tablespoons add a warm, classic Irish coffee note.
- Cinnamon streusel: Brown sugar, cinnamon, flour, salt, and butter create the crumbly topping.
- Coffee glaze: Confectioners’ sugar and cooled coffee make a quick finishing drizzle.
Measure the flour carefully by spooning it into a dry measuring cup and leveling the top. If you prefer an Irish cream version, about 1/2 cup Irish cream liqueur can replace the brewed coffee in the batter, though the flavor and sweetness will be somewhat different.
When planning a full brunch menu, pair the cake with a savory favorite such as this easy Eggs Benedict. The contrast between creamy, savory breakfast flavors and this cinnamon-coffee cake makes a satisfying spread.
How to Make It Step-by-Step
Step 1: Heat the oven to 350°F (175°C), then grease and line a 9-inch square pan with parchment. The parchment sling makes it much easier to remove the cake without disturbing the streusel edges.
Step 2: Prepare the streusel first by combining the flour, brown sugar, cinnamon, and salt. Stir in the melted butter until coarse crumbs form, then set the bowl aside so the mixture is ready when the batter is assembled.
Step 3: In another bowl, whisk together the cake flour, baking powder, baking soda, and salt. A thorough whisk distributes the leaveners and helps prevent salty or strongly risen pockets in the finished cake.
Step 4: Cream the softened butter and granulated sugar for about 2–3 minutes, until the mixture looks pale and fluffy. Beat in the room-temperature eggs one at a time, then add the vanilla and optional Irish whiskey.
Step 5: Combine the sour cream with the cooled coffee. Add the dry mixture to the butter mixture in two or three additions, alternating with the sour-cream mixture, and stop mixing as soon as no obvious streaks of flour remain.
Step 6: Spread half of the batter across the prepared pan. Sprinkle roughly one-third of the streusel over that layer, then carefully spread the remaining batter on top and cover it with the rest of the streusel.
Step 7: Bake for approximately 35–45 minutes. The center should spring back lightly when touched, and a toothpick should come out with a few moist crumbs rather than wet batter.
Step 8: Let the cake cool in the pan for 15–20 minutes, then lift it out using the parchment and continue cooling. Whisk the confectioners’ sugar with one to two tablespoons of cooled coffee and the optional whiskey or Irish cream, then drizzle over the cake.
Pro Tips for a Moist Coffee Cake
The most important preparation detail is cooling the coffee before adding it to the sour cream. Hot coffee can melt the butter in the batter and weaken the structure, which may leave you with a heavier cake.
Room-temperature eggs and sour cream blend more evenly with the creamed butter. If you forget to set them out early, place the eggs in warm water for a few minutes, but do not use hot water.
Mix gently once the flour goes into the bowl. A few small lumps are acceptable, while vigorous or prolonged mixing can develop gluten and make the crumb dense instead of soft.
For a nutty variation, add about 1/2 cup (55–60 g) chopped pecans or walnuts to the streusel. Stir them in with the dry streusel ingredients so they are distributed throughout the topping.
For a clean finish, wait until the cake has cooled substantially before glazing. If the cake is warm, the icing can disappear into the crumb instead of forming visible ribbons across the top.
If you enjoy rich, sliceable cakes, our chocolate pound cake is another excellent dessert to keep in your baking rotation.
Serving Suggestions
Serve each square at room temperature so the sour cream crumb feels soft and the coffee flavor is easy to appreciate. A hot cup of coffee, tea, or a small glass of cold milk makes a natural partner.
For dessert, add a spoonful of lightly sweetened whipped cream or a scoop of vanilla ice cream. The cool, creamy accompaniment balances the cinnamon streusel and turns a simple square into a more substantial after-dinner treat.
This cake is also a lovely choice for a casual St. Patrick’s Day gathering, especially when the optional whiskey is included. If you are serving children or guests avoiding alcohol, leave it out of both the batter and glaze; the brewed coffee still provides plenty of character.
For a party menu that includes homemade bread, consider serving these soft Hawaiian rolls alongside savory dishes, then bring out the coffee cake with the final coffee service.
Storage and Make-Ahead Advice
Once fully cool, cover the cake tightly and keep it at room temperature for up to 2 days. The glaze may soften the streusel slightly over time, but the sour cream helps the interior stay pleasantly moist.
For longer storage, refrigerate the covered cake and bring individual pieces to room temperature before serving. You can also warm a slice gently, but use short bursts so the glaze does not become overly runny.
The cake can be prepared earlier on the day it will be served. Bake it, let it cool, and add the glaze shortly before serving for the freshest appearance and the clearest coffee flavor.
If you are planning a hearty gathering, a savory main such as this ground beef chili in a bread bowl can come first, followed by small squares of coffee cake for dessert.
Easy Irish Coffee Cake Recipe (Moist & Delicious)
Ingredients
Method
- Heat the oven to 350°F (175°C). Grease a 9-inch square baking pan and line it with parchment, leaving enough paper over the sides to lift out the cooled cake.
- Make the streusel by stirring together the flour, brown sugar, cinnamon, and salt. Add the melted butter and stir until the mixture forms coarse, buttery crumbs.
- Whisk the cake flour, baking powder, baking soda, and salt in a separate bowl. Keeping the dry ingredients evenly combined helps the cake rise consistently.
- Beat the softened butter and granulated sugar for 2–3 minutes, until light and fluffy. Add the eggs one at a time, beating well after each addition, then mix in the vanilla and optional Irish whiskey.
- Stir the sour cream and cooled brewed coffee together in a small bowl. Add the dry ingredients to the butter mixture in two or three additions, alternating with the sour-cream mixture, and mix only until combined.
- Spread half of the batter in the prepared pan. Sprinkle roughly one-third of the streusel over the batter, add the remaining batter, and finish with the rest of the streusel.
- Bake for 35–45 minutes, until the center springs back lightly and a toothpick inserted into the middle comes out with a few moist crumbs. Avoid waiting for a completely dry toothpick, since that can indicate an overbaked cake.
- Cool the cake in the pan for 15–20 minutes, then use the parchment to lift it onto a rack and let it cool further. Whisk the confectioners’ sugar with cooled coffee and the optional whiskey or Irish cream, then drizzle the glaze over the cake.
Notes
Final Thoughts
This Easy Irish Coffee Cake Recipe is a reliable bake with a wonderfully moist center, crisp-edged cinnamon crumbs, and a glossy coffee glaze. The brewed coffee gives the cake depth, while sour cream keeps every bite tender without making the recipe complicated.
Make it alcohol-free for an everyday family dessert, or add Irish whiskey or Irish cream for a more distinctive Irish coffee-inspired finish. However you serve it, let the cake cool before glazing, cut it into generous squares, and enjoy it with your favorite warm drink.