Heirloom Corn Custard

Heirloom corn custard is a silky, corn-forward pudding with a delicate set and clean corn flavor. It’s custard at its simplest: corn, cream, eggs, and sugar cooked low and slow until it coats the back of a spoon. The secret is not rushing the heat and straining the mixture to catch any scrambled egg bits.

Ingredients for Heirloom Corn Custard

Fresh corn kernels provide the flavor base and a natural sweetness that softens the richness of heavy cream and whole milk. Egg yolks are the thickener that must be tempered gently to avoid turning grainy. Granulated sugar sweetens the custard and helps the yolks cook evenly. Salt brightens the corn flavor, while vanilla extract adds a warm note without competing with the corn.

Why This Heirloom Corn Custard Works

Corn custard relies on egg yolks to thicken without curdling. The yolks must be whisked with sugar first to break up the proteins, then cream and milk are added slowly while whisking. This tempering step prevents the yolks from scrambling when they hit heat.

The custard cooks in a double boiler at low heat, where the eggs thicken gradually as the temperature climbs toward 170°F (77°C). You’ll see it go from thin to glossy to thick enough to coat the back of a wooden spoon in a single layer. Once it reaches that stage, it’s done. Overcooking past this point turns it grainy.

Straining the hot custard through a fine sieve catches any bits of cooked egg white or yolk that may have scrambled at the edges of the pan. What comes through is pure, smooth custard. Chilling it stops the cooking and lets the texture set.

Mistakes To Avoid

Whisking the yolks with sugar is not optional. If you add the cream to unwhisked yolks, the sudden heat will scramble them into bits that no straining can fully remove. The custard will look curdled and taste grainy.

Cooking the custard over direct heat instead of a double boiler is a common shortcut that backfires. The bottom of the pan heats faster than the bulk of the custard, and the yolks scramble before the mixture thickens. You end up with a lumpy pudding.

Letting the custard come to a boil is another mistake. Even a gentle simmer can be too hot if the yolks are not yet fully thickened. The eggs will separate and turn grainy, and no amount of straining will save it.

Skipping the straining step leaves tiny cooked specks in the custard. They’re not unsafe, but they change the texture from silky to slightly sandy. A fine sieve takes 30 seconds and makes the difference between good and excellent.

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Ingredients

• 2 cups fresh corn kernels, about 4 ears
• 1 cup heavy cream
• 1 cup whole milk
• 5 egg yolks
• 1/4 cup (50 grams) granulated sugar
• 1/4 teaspoon salt
• 1 teaspoon vanilla extract

Step-by-step Instructions

1. Combine corn kernels, cream, and milk in a saucepan. Heat over medium until steaming and small bubbles form around the edge, about 5 minutes. Do not boil.
2. Pour the hot cream mixture through a fine sieve into a bowl, pressing gently on the corn to extract all the liquid. Discard the solids.
3. In a separate bowl, whisk egg yolks and sugar together for 2 minutes until pale and thick, then whisk in the salt.
4. Slowly pour the strained corn cream into the yolk mixture while whisking constantly, adding just a thin stream at first to temper the yolks.
5. Pour the mixture into the top of a double boiler set over simmering water. Stir constantly with a wooden spoon, scraping the bottom and sides often, until the custard reaches 170°F (77°C) on an instant-read thermometer, about 12 to 15 minutes.
6. Remove the custard from heat when it coats the back of a wooden spoon in a single layer that does not run when you drag your finger across it.
7. Strain the hot custard through a fine sieve into a clean bowl, pressing gently to pass all the liquid. Stir in vanilla extract.
8. Place plastic wrap directly on the surface of the custard to prevent a skin from forming. Chill in the refrigerator until cold, at least 3 hours or up to overnight.