Start by preheating your oven to 300°F. Yes, 300°F, not the 325°F or 350°F you might use for other desserts. Lower heat means the custard cooks gently and stays creamy instead of becoming grainy or overcooked. While the oven heats, fill a large pot with water and bring it to a boil on the stovetop. This water bath is essential—it distributes heat evenly and prevents the edges from cooking faster than the center. This is the professional technique that restaurants use, and it costs you nothing.

This step separates good creme brulee from grainy, broken custard. You have two options. Option one: Set a heatproof bowl over a pot of simmering water (double boiler method). Make sure the bowl doesn't touch the water. Add your chopped chocolate and let it sit for about two minutes, then stir gently until fully melted. Option two: Use the microwave in 20-second bursts on 50% power, stirring between each burst. This takes three to four bursts total. Microwave melting is faster and saves dishes, which is a real value when you're cooking efficiently. Either way, chocolate should melt slowly. Rush it with high heat and you'll have grainy, separated chocolate that won't incorporate smoothly into your custard. Let the melted chocolate cool for two to three minutes. This is crucial. If you pour hot chocolate into egg yolks, you'll scramble them. If you wait too long and it cools completely, it won't blend smoothly. Aim for just-warm chocolate—you should be able to comfortably touch the side of the bowl.

In a medium mixing bowl, combine your 3 egg yolks with ¼ cup of the granulated sugar. Whisk by hand—not with an electric mixer—for about one minute until the mixture lightens slightly and becomes pale yellow. You're not making whipped eggs; you're just incorporating the sugar until it dissolves. This takes about 60 seconds of steady whisking. The sugar should feel completely dissolved when you rub a tiny bit between your fingers (no gritty texture). Add the ⅛ teaspoon of sea salt and the vanilla extract if using. Whisk to combine. Now pour in your room-temperature heavy cream slowly while whisking gently. You're building an emulsion here—the fat in the cream needs to distribute evenly throughout the egg yolks. This happens naturally if you add the cream gradually and whisk constantly. Takes about one minute. The mixture should look smooth and homogeneous, with no visible streaks of cream.

Pour your cooled melted chocolate into the egg mixture slowly while whisking. The egg will temper the chocolate (bring it to safe temperature) while the chocolate enriches the custard. Whisk until completely combined and smooth. This should take about one minute. If you see any streaks of unmixed chocolate or cream, keep whisking. The final mixture should be glossy, dark, and uniform.

You'll need two 6-ounce ramekins or custard cups. Pour the chocolate custard mixture evenly between them, filling each about three-quarters full. Set both ramekins into a smaller baking dish (an 8x8-inch square pan works perfectly). Carefully pour the boiling water into the baking dish until it reaches halfway up the sides of the ramekins. This water bath regulates temperature and prevents the bottom of your custard from getting too hot. The water should come to about the middle of the ramekins, not higher. Carefully move the baking dish to your preheated 300°F oven. Bake for 40–44 minutes. The custards are done when the edges are set but the very center still jiggles slightly when you gently shake the ramekin. It should feel like the slight wobble of barely-set gelatin, not like liquid custard. This is the moment to pull them out. They'll continue cooking slightly from residual heat even after you remove them.

Let the custards cool in the water bath until the water is room temperature. This takes about 45 minutes. This slow, gentle cooling is what gives you that smooth, silky texture. Don't skip this step by removing them to cool on the counter—you'll get a different texture. Once the water is cool, carefully remove the ramekins, pat the bottoms dry, and place them on a clean surface.

Cover each ramekin with plastic wrap and refrigerate for at least 5 hours, preferably overnight. The custard will set completely and the flavors will deepen. You can make these up to 2 days ahead, which is perfect for meal planning or entertaining. They actually taste better the next day. When ready to serve, remove the plastic wrap. Sprinkle exactly 1 teaspoon of granulated sugar evenly over the surface of each custard. Use a kitchen torch (you can buy a small one for $15–$20 and it lasts years) to caramelize the sugar. Hold the torch about 2 inches from the surface and move it in a circular motion. The sugar will begin to melt and turn golden brown in about 30–45 seconds. You want a medium amber color, not dark brown. Once caramelized, wait 30 seconds for it to harden into a shell, then serve immediately.