Four ingredients, seven minutes of stirring, and no candy thermometer. That last part is why this recipe is worth having - traditional toffee means watching a thermometer for hard-crack stage, and the fear of getting it wrong is what stops most people making it at all.
This version, from Double Stop Bake Shop, replaces the thermometer with a timer. Cook butter and brown sugar for seven minutes, stirring the whole time, and it lands where it needs to land.
The result is crisp buttery toffee over a layer of toasted pecans, under melted chocolate, broken into shards.
Is this the same as christmas crack?
No, and it is worth being clear because both get called toffee.
This is English toffee - butter and sugar actually cooked into candy. Christmas crack is a tray of saltine crackers with a quick toffee poured over them, and it takes two minutes of boiling rather than seven. Crack is faster and salty; this is denser, buttery and closer to a confection.
If you are filling a gift tin, they are good together precisely because they are different.
The four ingredients
One stick of salted butter, 3/4 cup packed brown sugar, one cup of toasted pecans, and a heaping half cup of chocolate chips. That is it.
Why toffee goes wrong
It stays chewy. Undercooked. Seven full minutes at a proper bubble, not five.
It separates into a greasy layer. You stopped stirring, or the heat was too high. Medium to medium-high and constant motion.
It tastes burnt. Sugar caught on the base of the pan. A heavy-based saucepan and constant stirring prevent it.
More for the tin
Three-ingredient fudge needs no cooking at all, peppermint bark is a melt-and-set job, and gingerbread cookies cover the baked half.