Step-by-Step Method
Prep the Oven and Pan
Preheat to 325°F (163°C)
Lightly grease an 8x8-inch baking dish or arrange 6 individual 6-ounce ramekins inside a larger, deep 9x13-inch baking pan.
In a large mixing bowl, crack the 5 large eggs. Whisk them vigorously until completely smooth and the whites and yolks are entirely integrated. Pour in the entire can of sweetened condensed milk and whisk thoroughly until the mixture is uniform.
Emulsify the Liquid
Slow incorporation
Slowly drizzle the 3 cups of hot water (or heated milk) into the egg and condensed milk mixture. Whisk continuously as you pour. Adding the liquid gradually prevents the eggs from reacting to the warmth too quickly, keeping the liquid perfectly smooth.
Prepare the Water Bath (Bain-Marie)
Crucial for texture
Pour the liquid mixture into your prepared 8x8 dish or split it evenly among the ramekins. Carefully pour hot water into the larger outer pan until it reaches halfway up the sides of your custard dishes. This water bath distributes heat evenly and prevents the edges from drying out.
Bake and Cool
45 to 60 minutes
Bake at 325°F. If using ramekins, check at 45 minutes; a single large dish will take closer to 60 minutes. The custard is done when the edges look completely set, but the center still has a slight, gelatinous jiggle. Remove from the water bath and cool completely for 1 hour, then chill in the fridge before serving.
Troubleshooting a Silky Bake
The biggest pitfall when baking simple custards is ending up with a rubbery texture or a layer of liquid at the bottom (known as syneresis, or weeping). Because this recipe doesn't use cornstarch or flour as a safety net, texture relies entirely on cooking temperature.
Do not skip the water bath: Eggs are highly sensitive to direct heat. The water surrounding the baking dish acts as a buffer, ensuring the temperature never exceeds 212°F (100°C). Without it, the outer edges of the custard will curdle into a spongy texture before the center can cook through.
Look for the wobble: If you bake the custard until the absolute center is completely stiff, it is overcooked. The residual heat will continue cooking the interior even after it is pulled from the oven.
Strain for perfection: If you want a flawlessly glassy texture, pour the raw liquid mixture through a fine-mesh strainer straight into your baking dish to catch any tiny strands of unblended egg white.
This simple recipe proves that some of the most satisfying desserts do not require a massive ingredient list—just a few pantry staples and a little patience.
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