- Stir occasionally and gently with a wooden spoon until mixture reaches 260 to 265°F. (127 to 130°C). Continue cooking, stirring as few times as possible, until mixture reaches 300°F. (149°C). Stirring too much contributes to toffee separating. It is important to keep the mixture from burning, so stir gently once in a while.
- Store butter toffee in an container with tight-fitting lid in a cool, dry place. Do not refrigerate.