Step 1

Have all the ingredients measured and set out before you begin!

Step 2

Grease a large baking sheet with butter or nonstick spray. Set aside.

Step 3

In a medium-sized heavy bottom pot, stir together the water, sugar, corn syrup, and salt. Cook over medium heat until the mixture comes to a boil.

Step 4

Boil without stirring for about 5 minutes until it reaches 238°F on a candy thermometer.

Step 5

Add the peanuts and cook for 2 to 3 more minutes, stirring constantly, until it reaches 300°F on a candy thermometer. The mixture will be golden brown.

Step 6

Remove from heat and immediately stir in the butter, baking soda, and vanilla.

Step 7

Immediately pour the mixture onto the prepared baking sheet. Spread it with the back of a wooden spoon until it's the desired thickness and even.

Step 8

Let cool 10 minutes or until hardened. Break into pieces, using a large spoon.

Step 9

Store in an airtight container or plastic freezer bag. The brittle will keep for up to 2 months stored in a dark, dry place that stays fairly cool.