Pre-measure all of your ingredients.
Line a baking sheet with a Silpat or parchment paper that has been sprayed with cooking spray.
Combine the ½ cup granulated white sugar, ¼ cup honey, and ⅛ teaspoon kosher salt in a light-colored heavy-bottomed saucepan. Attach your candy thermometer to the edge of the saucepan, and make sure it is submerged in the liquid, but not touching the bottom of the pot.
Bring the mixture to a boil over medium-low heat. If you see sugar clinging to the sides of the pan, use a pastry brush dipped in water to brush down the sides of the pan. DO NOT STIR the sugar mixture. Stirring the sugar mixture may cause sugar crystals to form creating a grainy texture. You may swirl the pan gently about halfway through the cooking time to incorporate any uncooked sugar.
Cook the honey/sugar mixture until it reaches 300 degrees Fahrenheit.
Remove the saucepan from the heat and add the ½ teaspoon vanilla extract and 1 teaspoon baking soda. Whisk until the baking soda is completely incorporated. The mixture will bubble and triple in size as the baking soda reacts with the acidic caramelized sugar mixture.
Immediately pour the sugar mixture onto the prepared baking sheet and allow it to cool for about one hour. Do not spread the mixture around you will pop the bubbles that give honeycomb candy its signature texture.
Once the honeycomb has cooled, break or chop it into smaller pieces with a knife.