Mounds Brownies Recipe: Fudgy Coconut Chocolate Bars

Mounds brownies are rich chocolate brownies layered with a sweet, chewy coconut filling and a smooth chocolate topping, inspired by the coconut-and-chocolate candy bar. Baking the brownie base first keeps the coconut layer distinct, while a short chill helps the chocolate finish set into neat, sliceable bars.

Ingredients

10 tablespoons (142 g) unsalted butter, cut into pieces
1 cup (200 g) granulated sugar
¾ cup (75 g) unsweetened cocoa powder
2 large eggs (about 100 g without shells), at room temperature
2 teaspoons (10 ml) vanilla extract, divided
¾ cup (95 g) all-purpose flour, spooned into the cup and leveled
½ teaspoon (3 g) fine salt
2 cups (170 g) sweetened shredded coconut
½ of a 14-ounce can (about 198 g) sweetened condensed milk
6 ounces (170 g) semisweet chocolate, finely chopped or in chips
½ cup (120 ml) heavy cream
Neutral oil or a little extra butter, for greasing the pan

Instructions

Prepare the pan and oven. Heat the oven to 350°F (177°C). Grease an 8-inch (20 cm) square metal pan and line it with parchment paper, leaving a little overhang on two sides so you can lift out the brownies later. Let the oven preheat while you mix the batter.
Make the brownie batter. Put the butter in a medium heatproof bowl and melt it in short bursts in the microwave, or in a small saucepan over low heat. Whisk in the sugar and cocoa until the mixture looks thick and evenly combined. Let it cool for about 5 minutes; it should be warm, not so hot that it cooks the eggs on contact. Whisk in the eggs one at a time, then whisk in 1 teaspoon (5 ml) of the vanilla until glossy.
Fold in the dry ingredients. Add the flour and salt. Fold with a spatula just until no dry streaks remain; avoid beating the batter, which can make the brownies cakier. Scrape it into the prepared pan and spread it into an even layer, paying attention to the corners.
Bake the base. Bake for about 27 minutes, beginning to check at 25 minutes. The edges should look set and a toothpick inserted near the center should come out with moist crumbs rather than liquid batter. For food safety, USDA FSIS lists 160°F (71°C) as the safe minimum internal temperature for egg dishes; check the center with an instant-read thermometer. The brownie will continue to firm as it cools, so do not wait for a completely clean toothpick. Set the pan on a rack and cool the base for 45 minutes before adding the coconut layer.
Mix and spread the coconut filling. In a bowl, stir together the shredded coconut, sweetened condensed milk, a pinch of salt, and the remaining 1 teaspoon (5 ml) vanilla. Mix until the coconut is evenly coated and the filling holds together when pressed. Spoon it over the cooled brownie base and gently press it into an even layer with clean, lightly damp fingertips or the back of a spoon. Press firmly enough to make it compact, but do not crush the brownie beneath it.
Make the chocolate topping. Put the chopped chocolate in a heatproof bowl. Warm the cream in a small saucepan until steaming and just beginning to bubble at the edge; do not let it boil hard. Pour it over the chocolate and leave it undisturbed for 2 minutes. Stir slowly from the center outward until smooth. If a few pieces remain, warm the bowl over a pan of barely simmering water for a short time, stirring gently.
Finish and chill. Pour the chocolate mixture over the coconut and spread it to the edges with an offset spatula or the back of a spoon. Refrigerate the pan for 1 hour 30 minutes, or until the topping is firm enough to cut cleanly. Lift the slab out using the parchment, set it on a cutting board, and slice into 16 squares with a large sharp knife. For tidier edges, wipe the knife between cuts.

Tips

Measure flour lightly. Spoon it into the measuring cup and level the top rather than scooping directly from the bag. Scooping can pack in extra flour and make the brownie base dry or tough.
Use the right pan if possible. A metal 8-inch square pan heats predictably and gives the base a crisp edge. A glass pan may bake more slowly and retain heat longer, so start checking at 25 minutes and allow for a little extra cooling before layering.
Keep the coconut layer even. If the filling sticks to the spoon, dampen the spoon lightly with water. Avoid adding much extra liquid: the condensed milk is what binds the coconut, and a loose filling can slide when you cut the bars.
Choose chocolate you enjoy eating. Semisweet chocolate balances the sweet coconut. If using very dark chocolate, the topping will taste more bittersweet; if using milk chocolate, it will be sweeter and softer. Finely chopped chocolate melts more evenly than large pieces.

Serving Suggestions

Serve the brownies chilled for especially tidy squares, or let them stand at room temperature for 10 to 15 minutes if you prefer a softer brownie and a less firm topping. They are rich, so modest squares work well after a meal. A small scoop of vanilla ice cream or a spoonful of lightly sweetened whipped cream makes a simple dessert plate without competing with the coconut layer.

For a casual gathering, arrange the pieces on a platter with the cut sides facing up so the three layers show. A few toasted coconut flakes can make a useful garnish, but add them just before serving so they remain crisp. Coffee, black tea, or a glass of cold milk pairs nicely with the chocolate and sweet coconut.

Variations

Use unsweetened coconut. Replace the sweetened shredded coconut with 2 cups (160 g) unsweetened shredded coconut if you prefer a less sweet filling. The texture may be slightly drier, so stir in 1 to 2 tablespoons (15 to 30 ml) additional condensed milk only if the mixture will not hold together when pressed.

Add toasted coconut on top. Toast ¼ cup (20 g) extra shredded coconut in a dry skillet over medium-low heat, stirring frequently, until pale golden. Cool it completely and scatter it over the chocolate while the topping is still wet. Watch closely: coconut can go from golden to burnt quickly.

Make the top a little saltier. Sprinkle a small pinch of flaky salt over the chocolate before chilling. This creates a more pronounced sweet-salty contrast. Keep the amount restrained because the brownie and filling already contain salt.

Use a boxed brownie mix. For a shortcut, prepare enough brownie batter for an 8-inch square pan according to its package directions, bake it, and cool it fully before adding the coconut and topping from this recipe. Follow the mix’s own baking time and doneness instructions; the homemade brownie timing above will not necessarily apply.

Storage and Reheating

Because the filling contains sweetened condensed milk and the topping contains cream, refrigerate the brownies within 2 hours of serving. Store them in a covered airtight container, with parchment between layers if stacking, for 3 to 4 days. The chocolate top will stay firm in the refrigerator; let a piece sit at room temperature for about 10 minutes before serving if you want a softer bite. Reheating is not needed and can melt the topping.

To freeze, chill the slab until the topping is firm, then cut it into squares. Wrap each square or place parchment between pieces in a freezer-safe airtight container and freeze for up to 2 months for best quality. Thaw the pieces in the refrigerator, still covered, so condensation forms on the wrapping rather than directly on the chocolate.

Frequently Asked Questions

Can I make Mounds brownies a day ahead?
Yes. They are convenient to prepare a day ahead because the topping needs time to set. Once sliced, keep them covered in the refrigerator and bring them out shortly before serving. Cutting after the chocolate has chilled makes the layers easier to handle.

Why is my coconut filling crumbly?
The coconut may be too dry, or it may not be coated evenly with condensed milk. Stir thoroughly and press a small amount in your hand: it should clump and hold its shape. If it falls apart, mix in condensed milk 1 teaspoon (5 ml) at a time until it binds. Avoid adding a large splash at once, which can make the layer wet.

Can I use a 9-inch square pan?
Yes, but the brownies will be thinner and may bake faster. Begin checking the brownie base several minutes earlier than the stated time, and use the visual and thermometer checks rather than relying on the clock alone. The coconut and chocolate layers will also be thinner across the larger surface.

How do I cut clean squares without cracking the top?
Chill the brownies until the topping is firm but not rock-hard. Use a large sharp knife warmed under hot water and thoroughly dried, then make a decisive downward cut instead of sawing. Wipe and warm the blade again between cuts as needed. If the chocolate is very cold, let the slab rest for a few minutes before slicing.

Can I use coconut cream instead of condensed milk?
Not as a direct swap. Sweetened condensed milk is thick and sweet, and it binds the coconut into a compact layer. Coconut cream is thinner and usually unsweetened, so substituting it as-is would make the filling looser and less sweet. For a reliable result, use condensed milk; a dairy-free condensed-milk alternative may work, but its texture and sweetness can vary by product.

Can I make these without nuts?
The recipe contains no nuts as written, but check the labels on the chocolate, coconut, and condensed milk for allergen statements and possible cross-contact warnings. Use products that meet the needs of the person eating them, and keep utensils and the pan free of nut residue.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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