My coworker brought this treat into the office and it was gone in five minutes. It only takes 3 ingredients to recreate this viral coffeehouse favorite at home.

This slow cooker 3-ingredient brown sugar shaken espresso fudge is my cozy, kitchen-counter version of that viral coffeehouse drink everyone seems to love. A coworker brought a pan of this into the office and it disappeared in five minutes—no exaggeration. It layers the flavors of a brown sugar shaken espresso (deep coffee, warm brown sugar, and creamy sweetness) into thick, smooth fudge with a pretty marbled top and a crackly brown sugar crust. Because it’s made right in the slow cooker with just three pantry-friendly ingredients, it’s perfect for busy parents, potlucks, or anytime you want a special treat without a lot of fuss.

Cut the fudge into small squares and serve it chilled or at cool room temperature with hot coffee, tea, or a cold glass of milk. For a fun coffeehouse-style moment at home, pair a square of fudge with a homemade iced latte or cold brew over ice. On a dessert tray, this fudge plays nicely alongside simple butter cookies or fresh fruit like strawberries and orange slices to balance the sweetness. If you’re serving kids, offer tiny pieces and plenty of milk; for adults, a little square goes beautifully with an after-dinner espresso or decaf.

Servings: 24

3 cups (about 18 oz / 510 g) white chocolate chips

Line an 8x8-inch baking pan or small baking sheet with foil, letting the foil overhang the sides so you can lift the fudge out later. Smooth out as many wrinkles as you can, then lightly mist or rub the foil with a tiny bit of oil or nonstick spray to help the fudge release cleanly.

Set up your slow cooker on LOW heat. Add the white chocolate chips and the sweetened condensed milk to the slow cooker insert. Sprinkle in 2 tablespoons of the instant espresso powder and 2 tablespoons of the light brown sugar, trying to spread them out a bit over the top.

Cover the slow cooker with the lid, leaving it slightly cracked with a wooden spoon or heat-safe utensil if your slow cooker tends to run hot. Let the mixture warm on LOW for 30–45 minutes without stirring, until the white chocolate chips look soft and glossy around the edges.

After 30–45 minutes, use a heat-safe spatula to stir the mixture slowly but thoroughly. Keep stirring until the chocolate chips are fully melted and the mixture is thick, smooth, and evenly colored. If there are still a few lumps, cover and heat another 10–15 minutes, then stir again until completely smooth.

Once the fudge base is smooth, scoop out about 1/3 cup of the mixture into a small heatproof bowl. Stir the remaining 1 tablespoon of instant espresso powder into this smaller portion to make a darker, stronger coffee swirl. If it thickens too much, pop the small bowl back into the warm slow cooker (with the heat off) for a couple of minutes just to loosen it.

Pour the main batch of fudge (the lighter mixture) into the foil-lined pan. Use your spatula to spread it into an even layer, pressing it gently into the corners and smoothing the top as best you can. Don’t worry if it doesn’t look perfect—this is a homey, forgiving recipe.

Spoon the darker espresso fudge mixture in small dollops over the top of the pan. Use a butter knife or a thin spatula to gently swirl it through the lighter fudge, dragging the knife in loose figure-eights. Try not to overmix; you want streaks and marbling, not a fully blended color.

Sprinkle the remaining 1 tablespoon of light brown sugar evenly over the top of the swirled fudge. Lightly press it down with clean fingers or the back of a spoon so it sticks to the surface. This will melt slightly as the fudge sets and give you that pretty, crackly brown sugar crust on top.

Let the pan sit at room temperature for about 20–30 minutes to cool slightly, then transfer it to the refrigerator. Chill for at least 3–4 hours, or until the fudge is very firm all the way through. For best texture and clean cuts, overnight chilling is ideal.

Once fully chilled and set, use the foil overhang to lift the fudge out of the pan and onto a cutting board. Peel away the foil. Using a sharp knife, cut the fudge into small, thick squares. Wipe the knife with a warm, damp cloth between cuts to keep the edges neat and preserve the pretty espresso swirls.

Store the fudge in an airtight container, layered with parchment or wax paper between layers, in the refrigerator for up to 1 week. For serving, you can enjoy it straight from the fridge for a firmer bite or let it sit at room temperature for 5–10 minutes for a softer, creamier texture.

For a milder coffee flavor, reduce the instant espresso powder to 2 tablespoons total and skip adding it to the reserved swirl portion; you’ll still get a gentle coffeehouse vibe without it being too strong for kids or non-coffee drinkers. For a bolder, more grown-up version, add an extra teaspoon of espresso powder to the swirl portion, or stir in a teaspoon of vanilla extract after the fudge base is melted (off the heat) for a flavor closer to a coffeehouse latte. If you don’t have instant espresso, you can use instant coffee granules, but you may need an extra tablespoon to get the same intensity; dissolve them in a teaspoon or two of the sweetened condensed milk before stirring in so they blend smoothly. To make it a little fancier for a party, lightly sprinkle a pinch of flaky sea salt over the top along with the brown sugar, or press a few chocolate-covered espresso beans into the surface before chilling. For picky eaters who don’t love visible swirls, simply skip the swirling step and stir all the espresso and brown sugar directly into the main batch for a uniform, light brown fudge. FOOD SAFETY TIPS: Always keep the slow cooker on LOW for this recipe; high heat can scorch the chocolate quickly. Stir gently but thoroughly to avoid hot spots. Use dry utensils when handling chocolate, as water can cause it to seize. Let the fudge cool before covering it tightly to prevent condensation, which can make the top sticky. Store the fudge refrigerated in a clean, airtight container and avoid leaving it out at room temperature for more than 2 hours at a time, especially in a warm kitchen or at a potluck. If serving to young children or anyone sensitive to caffeine, remember that this fudge does contain coffee; offer small portions or make a half-batch using less espresso powder.