Guinness Chocolate Cake topped with Guinness whipped cream is decadent, velvety, and not overly sweet. If you love chocolate cake, you'll love this recipe!
Place the cake mix in a medium bowl. Add the sour cream, vegetable oil, eggs, and Guinness. Mix well.
15 ounces chocolate cake mix, ¼ cup sour cream, ¼ cup vegetable oil, 3 eggs, 1 cup Guinness beer
Spray the slow cooker with a baking spray (or just coat with a little vegetable oil if you don't have baking spray). Add the batter to the slow cooker.
Drape a paper towel on top of the crock pot and position the lid on top of it. Cook on low for 2 to 2 ½ hours (until the middle does not jiggle when you shake the slow cooker).
For the whipped cream (optional):
Place the heavy cream in a medium bowl. Beat with a hand mixer until the cream begins to thicken.
1 cup heavy cream
Add the sugar and Guinness, and continue to beat until the cream is stiffened.
Don’t worry if the batter seems thin as you pour it into the crock pot, that’s completely normal for this recipe.
Make sure you spray the slow cooker generously with baking spray or lightly coat with oil to ensure the cake releases easily.
When removing the cake, loosen the edges with a silicone spatula and lift it out in halves using a wide spatula or pancake flipper for less breakage.
For best texture and flavor, make the whipped cream just before serving. It can be made a few hours ahead if needed, but will lose some of its fluff over time.
Variation Suggestions:
For a coffee-chocolate twist, replace half of the Guinness with brewed coffee.
Add a handful of chocolate chips or chopped dark chocolate to the batter for an even richer flavor.
If desired, swap the Guinness for a another stout or porter of your choice.
You can make a non-alcoholic version using root beer or strong coffee instead of beer.
Serving Suggestions:
Serve warm right out of the slow cooker for a molten-style dessert.
Top with a scoop of vanilla ice cream.
Add cherry pie filling, fresh cherries, or a drizzle of chocolate syrup.
Garnish with chocolate shavings or cocoa powder for a simple but elegant finish.
Storage Info for Leftovers:
Store leftover cake in an airtight container in the refrigerator for up to 3 days.
Reheat leftover individual slices in the microwave for 15–20 seconds before serving for the best texture.
Leftover whipped cream can be kept in the refrigerator for 1–2 days, though it may lose some volume—give it a quick whisk to revive it before serving.
This cake also freezes well for up to 2 months; thaw overnight in the refrigerator before reheating to serve.