Step 1

Mix Sugar, Corn Syrup and Evaporated milk in large pan and cook over medium heat.

Step 2

Sir occasionally.

Step 3

Mixture will begin boiling. If it boils too close to top reduce heat slightly.

Step 4

Continue cooking until mixture reaches soft ball stage (230-240 degrees). You can test for this by seeing the syrup forms a ball while in the cold water, but flattens once removed from the water.

Step 5

When it reaches this stage, remove from heat.

Step 6

Take butter and grease inside of glass baking dish.

Step 7

Add remainder of butter and vanilla extract and stir until butter is melted and incorporated.

Step 8

Add peanut butter and continue stirring until mixture start to lose its’ sheen.

Step 9

Then pour into buttered 8X8 (for thick squares) or a 9X9 (for less thick squares) baking dish and allow to cool.