Step 1

Grease a 9x13 baking dish and set aside.

Step 2

In a small saucepan (with a heavy bottom if you have it!), pour in 2 cups of sugar and cook over low heat while stirring often. Cook until sugar is completely melted, about 20 minutes.

Step 3

As sugar cooks down, add the 4 cups of remaining sugar and heavy cream to a large saucepan (or dutch oven, you want a big pot here!). Simmer over low heat until the sugar in your small saucepan has melted. Add melted sugar to a large saucepan with continuously stirring.

Step 4

Bring the heat up to medium and cook mixture until 244 degrees F or softball stage.

Step 5

Remove from heat and stir in baking soda until completely combined.

Step 6

Add butter and vanilla. Stir until butter has melted and the mixture is smooth.

Step 7

Let rest for 20 minutes.

Step 8

After the mixture has rested, stir in nuts and mix until the sheen has gone. Transfer to prepared baking dish.

Step 9

Let cool 1-2 hours or overnight. Cut into small squares to serve.