Finding a reliable peanut brittle recipe without corn syrup can be tricky. Corn syrup is commonly used because it helps prevent crystallization and makes candy-making more forgiving. But if you either avoid corn syrup or don’t have it on hand, it’s still possible to make a crisp, flavorful peanut brittle using just sugar and a few pantry staples.
This guide explains how to make classic peanut brittle without corn syrup, walking through the important steps and offering practical tips to avoid common problems. The method is essentially making a caramel and folding in roasted peanuts and baking soda at the end to produce that signature, airy brittle texture.
How to Make Peanut Brittle Without Using Corn Syrup
Peanut brittle is simply a caramelized sugar mixture with peanuts folded in and aerated by a small amount of baking soda. The trick when you’re not using corn syrup is to prevent sugar crystals from forming during the boiling stage. That’s why careful dissolution, gentle heating, and no stirring once the syrup boils are crucial.
Begin by preparing a rimmed baking sheet lined with parchment paper. Lightly grease the paper with melted butter or non-stick spray to make removing the brittle easier once it sets.
In a small saucepan, combine the sugar with about 120 ml (1/2 cup) of cool water. Place the pan over low heat and stir constantly until the sugar is completely dissolved. This step is the most important: if any sugar crystals remain when the mixture begins to boil, the syrup can seize and crystallize, ruining the batch.
If the syrup begins to bubble before the sugar has fully dissolved, remove the pan from the heat and continue stirring until dissolution is complete. Patience at this stage prevents headaches later.
Once the sugar is fully dissolved, bring the syrup to a boil. Do not stir the mixture after it starts boiling—stirring can encourage crystal formation. Use a pastry brush dipped in water to wash down any sugar that clings to the sides of the pan so stray crystals don’t seed the syrup.
Increase the heat slightly to medium and leave the syrup to boil undisturbed. Watch carefully—caramel can progress from amber to burnt quickly. As the sugar cooks, the syrup will darken from clear to honey-coloured, to amber, and finally to dark amber. Small wisps of smoke are a sign it’s reached the right depth of flavor. Expect this stage to take around 20 minutes after the sugar has dissolved.
Remove the pot from the heat immediately when the syrup reaches a dark amber and you see faint smoke. Carefully stir in the butter, then add the salt, baking soda and vanilla. The mixture will foam and sputter—this is normal; stand back to avoid splatters because the caramel is extremely hot.
Quickly fold in the roasted, unsalted peanuts, ensuring they are well coated with the caramel before it begins to set. Pour the mixture immediately onto your prepared baking sheet and use a heatproof spatula to spread it evenly.
Allow the brittle to cool and harden completely, at least four hours or overnight. Once set, lift the parchment from the sheet, place it on a cutting board, cover with another sheet of parchment, and break the brittle into pieces using a rolling pin or mallet.
Peanut Brittle Without Corn Syrup
Ingredients
- 400 g (2 cups) caster sugar
- 50 g (4 tbsp) unsalted butter
- 12 g (2 tsp) salt
- 1 tsp baking soda
- 1 tsp vanilla extract
- 300 g (2 cups) roasted, unsalted peanuts
Instructions
- Line a rimmed baking sheet with parchment paper. Add sugar to a small saucepan and pour in 120 ml (1/2 cup) cool water. Set over low heat and stir constantly until the sugar is completely dissolved.
- Wash down the sides of the pot with a pastry brush dipped in water to prevent sugar crystals. Once the mixture boils, increase the heat to medium and do not stir. Allow to boil until the syrup reaches a deep amber color and you see faint wisps of smoke.
- Remove the pot from heat and carefully stir in the butter. It will foam—this is normal. Add the salt, baking soda and vanilla, stirring until combined.
- Stir in the peanuts quickly to coat them, then pour the mixture onto the prepared sheet tray and spread evenly. Let cool completely for at least 4 hours.
- Once set, remove the brittle from the tray, cover with parchment to prevent flying shards, and break into pieces with a rolling pin or mallet.
Notes
- Use caster (superfine) sugar if possible; it dissolves more quickly. Granulated sugar will work but may take longer to dissolve.
- For consistent seasoning, weigh the salt rather than relying on volume measurements—different salts vary widely in density.
- Ensure the sugar is fully dissolved before the syrup boils. If necessary, remove the pan from heat to finish dissolving. Undissolved crystals at the boil stage can cause the syrup to crystallize.
Nutrition
That’s how you make homemade peanut brittle without corn syrup. The technique takes a little patience, but the result is a crisp, crunchy classic candy made from simple ingredients.
Have questions about the method or ingredients? Feel free to ask in the comments.
