Triple Chocolate Salted Caramel Brownie Bars with Hazelnuts and Almonds Step-by-step instructions

Before you start

Gather every ingredient and tool before you start, because the batter comes together quickly once the chocolate is melted. Heat the oven to 350°F (175°C) and set the rack in the center. Line an 8-inch square metal pan with parchment paper, leaving overhangs on two sides. Chop the dark chocolate, milk chocolate, hazelnuts and almonds on a wooden board, and set the soft caramel pieces beside them.

Cube the butter and let the eggs stand at room temperature for about thirty minutes so they blend smoothly into the batter. Keep the white chocolate block cold for grating, and place a box grater and a spoon within reach. Having everything measured and cut in advance keeps the batter from sitting too long and helps you pour and swirl with confidence.

Instructions

Chopped and melted chocolate

1. 1Chop the chocolate and nuts
   Place the wooden board on a stable surface. Chop the dark chocolate, milk chocolate, hazelnuts and almonds with a sharp knife into rough pieces of varied size. Add the soft caramel pieces alongside the nuts so everything sits together on the board, ready for the batter.
   Look for Pieces should be rough and uneven, with some small crumbs and some larger chunks.
   Tip Chill the chocolate for ten minutes first so it cuts cleanly without crumbling.
2. 2Preheat and line the pan
   Heat the oven to 350°F (175°C). Line the 8-inch square metal pan with parchment paper, leaving an overhang on two sides so the bars lift out easily later. Set the pan aside while you prepare the batter.
   Look for The parchment should lie flat against the bottom and sides with no wrinkles.
   Tip Lightly grease the parchment so it releases the edges cleanly after baking.

After the first phase, the chocolate should be finely melted, glossy and smooth in the bowl, with no streaks of unmelted butter. The chopped dark chocolate, milk chocolate, hazelnuts, almonds and caramel should sit separately on the board in rough, uneven pieces.

Check that the melted mixture has cooled slightly so it will not scramble the eggs when you whisk them in. The pan should be lined and the oven should be at 350°F (175°C). If the chocolate looks grainy, remove it from the heat and stir until it smooths out before continuing with the batter.

Batter, layers and caramel ribbons

3. 3Melt chocolate and butter
   Melt the dark chocolate and butter together in a heatproof bowl set over barely simmering water, stirring until smooth. Remove the bowl from the heat and let it cool for a few minutes so the eggs will not scramble.
   Look for The mixture should look glossy and smooth with no visible lumps of butter.
   Tip Stir gently and keep the water below a simmer to avoid overheating the chocolate.
4. 4Make the brownie batter
   Whisk the sugar, eggs and vanilla into the melted chocolate until glossy. Fold in the flour, cocoa powder and salt with a spatula until just combined, taking care not to overmix. The batter should be thick, dark and smooth.
   Look for The batter should fall in thick ribbons and look smooth and glossy.
   Tip Stop folding as soon as no streaks of flour remain to keep the crumb dense.
5. 5Pour, scatter and swirl
   Pour the batter into the lined pan and spread it evenly. Scatter the chopped chocolate pieces and nuts over the top, pressing them in lightly. Drizzle the caramel over the batter and swirl it through with a spoon to create gold ribbons.
   Look for Caramel should form visible gold streaks through the dark batter without fully blending in.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Use only three or four loose swirls so the caramel stays in distinct ribbons.

At the end of the second phase, the batter should be thick, dark and glossy, falling from the spatula in slow ribbons. It should spread evenly in the lined pan with the chopped chocolate and nuts scattered on top. The caramel should form visible gold streaks through the surface after just three or four swirls, without fully blending into the dark mixture. Check that no flour pockets remain, since those will show as pale streaks in the baked bars. If the caramel is too stiff to drizzle, warm it for a few seconds before swirling it through the batter.

Baked, cooled and cut bars

6. 6Bake until set and fudgy
   Bake the brownies on the center rack for 30 to 35 minutes, until the top looks set and a toothpick inserted in the center comes out with moist crumbs. Cool the pan on a rack, and grate the white chocolate over the top with a box grater.
   Look for The top should look set with a slight sheen, and the edges should pull from the pan.
   Tip Bake a few minutes less for a fudgier center and a few minutes more for a firmer bar.
7. 7Cool, sprinkle and cut
   Let the brownies cool in the pan for at least one hour. Lift the parchment overhang, cut the slab into 16 squares with a sharp knife, and sprinkle each bar with flaky sea salt before serving.
   Look for The center should feel firm and dense when pressed gently with a fingertip.
   Tip Wipe the knife between cuts so the caramel layers stay clean and glossy.

By the end of the final phase, the brownies should have a set, lightly shiny top and edges that pull slightly away from the parchment. A toothpick inserted in the center should come out with moist crumbs rather than wet batter. The grated white chocolate should look like fine curls and shavings across the surface. Once cooled in the pan for at least an hour, the slab should feel firm and cut cleanly into sixteen squares. Sprinkle each bar with flaky sea salt just before serving so the crystals stay crisp and distinct on the glossy top.

Common mistakes

The most common mistake is overmixing the batter after adding the flour and cocoa. Once the flour is in, fold only until the streaks disappear, because extra stirring develops gluten and produces a tougher, more cakey crumb rather than a fudgy one. Another frequent error is melting the chocolate over heat that is too high, which can seize it and leave a grainy texture.

Keep the water below a simmer and stir gently. Swirling the caramel too much will blend it into the batter until the gold ribbons disappear, so use only a few strokes with a spoon. Cutting the bars while they are still warm causes them to crumble and smear the caramel, so give them at least an hour to cool in the pan before slicing with a sharp knife.

How to tell it’s done

The brownies are done when the top looks set with a slight sheen and the edges have begun to pull away from the parchment. Insert a toothpick into the center: it should come out with moist crumbs clinging to it, not wet batter. The center should feel firm and dense when pressed gently with a fingertip, and the chocolate chunks should look melted and glossy.

Bake for 30 to 35 minutes in total, checking a few minutes before the end. Because these bars contain eggs, the interior should reach a safe set temperature of 160°F (71°C) when measured with a probe thermometer. A slightly shorter bake gives a fudgier center, while a few extra minutes produce a firmer, more sliceable bar. Remember that the bars continue to set as they cool.

• Egg dishes: 160°F (71°C) in the thickest part