In a heavy bottomed small saucepan, melt the butter over medium heat. Add the sugar and salt and whisk vigorously for one minute until combined. Cook, stirring constantly, until the mixture looks like melted peanut butter and a candy thermometer reaches 295 to 305°F, about 10 minutes.
Immediately and carefully pour the hot toffee onto the prepared baking pan, allowing it to spread into an even layer. Let cool and harden for about 20 minutes.
*Don't use European-style butter (82% butterfat+) in this recipe. It contains too much butterfat and will cause the toffee to separate.
Homemade Toffee Bits https://handletheheat.com/homemade-toffee-bits/ December 8, 2020