Warm popped corn in slow oven.

Meanwhile, heat the syrup over low heat, allowing it to brown but not scorch.

Add syrup, vinegar, water, and salt to it.

Stir only until sugar is dissolved.

Boil mixture until it forms a hard ball when it is dropped in cold water (270°).

Remove from heat and add soda and peanuts, stirring well.

Pour immediately over warm popped corn.

Stir well until all kernels are coated.

Allow to cool, stirring occasionally to break up large chunks.