My sister makes these for all her summer girls nights and they are always a huge hit. Only 4 ingredients for the most rich and decadent after dinner bite.

My sister started bringing this slow cooker espresso martini fudge to our summer girls’ nights a few years back, and now it’s simply expected on the table right alongside the potato salad and deviled eggs. It’s just four ingredients, but it tastes like something from a fancy downtown dessert bar—rich, dark, and a little grown-up from the coffee and liqueur. I love that it uses the slow cooker, which feels very Midwestern to me: you stir it together, let it quietly melt while you visit on the porch, then pour it into a pan lined with parchment and let it set. By the time supper dishes are done, you’ve got glossy squares of deep brown fudge, topped with roasted espresso beans, ready for an after-dinner bite.

Serve these espresso martini fudge squares well-chilled so they hold their shape and keep that lovely dense, truffle-like texture. They’re wonderful on a little dessert tray with fresh berries and maybe a bowl of salted nuts. A hot cup of coffee, decaf or regular, is a natural partner, but they’re also nice with a small glass of milk or a splash more coffee liqueur over ice. Cut the fudge into small bite-size squares; it’s very rich, so a little goes a long way, especially after a hearty meal of grilled meats, casseroles, or potluck favorites.

Servings: 25–36 small squares

3 cups (about 18 oz / 510 g) semi-sweet chocolate chips

Line an 8x8-inch (or similar) baking pan with parchment paper, letting the paper hang over the sides to form handles. This makes it easy to lift out the fudge later. Lightly smooth the paper into the corners.

Set a small slow cooker (2–4 quart size works best) on LOW heat. Add the semi-sweet chocolate chips and the entire can of sweetened condensed milk to the crock.

Sprinkle in the finely ground espresso powder. Pour in the coffee liqueur. Do not add any extra liquid; the fudge needs to stay thick to set properly.

Cover the slow cooker and let the mixture warm on LOW for 30–45 minutes. Do not use HIGH heat, as chocolate can scorch easily along the edges.

After about 30 minutes, remove the lid and stir the mixture slowly but thoroughly with a rubber spatula, scraping the bottom and sides. Continue heating, stirring every 10–15 minutes, until the mixture is completely smooth, glossy, and very thick, 45–60 minutes total depending on your slow cooker.

Once the chocolate mixture is melted and silky with no visible lumps, turn off the slow cooker and unplug it. Give the fudge one last good stir to be sure everything is evenly combined and the espresso flavor is distributed.

Quickly pour or scrape the hot fudge mixture into the parchment-lined pan. Use the spatula to spread it into an even layer, smoothing the top as best you can. It will start to firm up as it cools, so work steadily.

While the fudge is still warm and soft on top, scatter the whole roasted espresso beans evenly over the surface. Gently press them in with clean fingertips or the back of the spatula so they adhere but still sit proudly on top.

Let the pan of fudge cool at room temperature until it is no longer warm to the touch, about 1–2 hours. Then cover the pan lightly with plastic wrap or foil and refrigerate until fully set, at least 3–4 hours or overnight for the cleanest cuts.

Once the fudge is firm and chilled through, use the parchment paper overhang to lift the whole slab out of the pan and onto a cutting board. Peel back the paper from the sides.

Using a long, sharp knife, cut the fudge into small, thick squares, wiping the knife with a warm, damp cloth between cuts for neat edges. Aim for bite-sized pieces, about 1 to 1½ inches each, as the fudge is very rich.

Arrange the squares on a platter, showing off the glossy tops and espresso bean garnish. Keep refrigerated until serving, especially on warm summer evenings, then bring out just before your after-dinner coffee or nightcap.

For a milder coffee flavor, reduce the espresso powder to 1 tablespoon and keep the coffee liqueur the same. For a stronger, more intense espresso bite, use dark chocolate chips instead of semi-sweet and add an extra teaspoon of espresso powder. If you prefer to skip alcohol, you can replace the coffee liqueur with very strong brewed espresso or concentrated cold brew; just be sure it is at room temperature and limit it to 3 tablespoons total so the fudge still sets firmly. For a slightly sweeter profile, swirl in a handful of white chocolate chips right at the end, stirring only once or twice so they streak through the dark fudge. You can also swap the espresso beans on top for chocolate-covered espresso beans for a gentler crunch, or for finely chopped toasted almonds or hazelnuts if you want less caffeine on the surface. Always melt chocolate on LOW in the slow cooker and stir regularly to prevent scorching; if you notice a burnt smell or grainy texture, the heat is too high. Be mindful that this fudge contains both caffeine and alcohol, so it is best served only to adults, especially later in the evening. Store leftovers tightly covered in the refrigerator for up to one week, and avoid leaving the fudge out in hot weather for long periods so it doesn’t soften too much or lose its shape.