Combine syrup, sugar and salt in a 2 quart casserole or mixing bowl. Microwave at high 5 minutes.

Stir in peanuts. Microwave at high 5 minutes stirring after each 2 and 4 minutes until syrup and peanuts are lightly browned.

Stir in butter, vanilla and soda until light and foamy.

Spread to 1/4 inch thickness on large well buttered cookie sheet. Let cool then break.