Old-Fashioned Chocolate Fudge

This is real fudge made the way your grandmother did it, with a candy thermometer, patience, and no shortcuts. Unsweetened chocolate melted with milk, sugar, corn syrup, and salt gets cooked to the soft ball stage, cooled to lukewarm without touching it, then beaten until it loses its gloss and transforms from a shiny liquid into a thick, creamy candy.

The soft ball stage at 234°F (112°C) is the critical temperature. Under that mark and the fudge stays gooey and never sets. Over it and you’re headed toward hard candy territory. A candy thermometer takes the guesswork out, but the cold water test works too: a teaspoon of syrup dropped into cold water should form a soft, pliable ball.

Not stirring during the cooling phase is the hardest part. Adding the butter and vanilla but leaving them sitting on the surface while the mixture cools to 110°F (43°C) feels wrong, but it’s essential. Disturbing the sugar crystals before the mixture is cool enough creates grainy fudge. When you finally beat it, those 15 minutes of vigorous mixing transform the texture from glossy liquid to smooth, matte candy.

Kitchen Tips

• Use a heavy-bottomed pan. Thin pans have hot spots that scorch the milk and chocolate, giving the fudge a bitter, burnt taste.
• Don’t scrape the sides of the pan while cooking or pouring. Sugar crystals clinging to the sides can seed the whole batch and cause graininess.
• Beat until the fudge loses its sheen. The shift from glossy to matte is your signal to pour immediately. Wait too long and it sets in the pot.

Variations

• Add chopped walnuts during the last minute of beating for classic chocolate walnut fudge.
• Swirl in peanut butter just before pouring into the pan for a marbled chocolate-peanut butter version.