Sugar Candy with Citric Acid

Introduction

Sugar cooked to 310°F and folded with citric acid gives you a hard candy that starts sweet and finishes sharp. You shape it while it is still pliable, snip it into drop-sized pieces, and dust with powdered sugar so the candies stay separate. It works for small-batch candy making, gift jars, or a shelf-stable treat you can keep on hand.

Recipe Details

• Prep Time: 10 minutes
• Cook Time: 20 minutes
• Total Time: 30 minutes
• Servings: 12

Ingredients

2 cups (480 mL) white granulated sugar

1 cup (240 mL) water

½ tsp (2.5 mL) cream of tartar

1 Tbsp (15 mL) citric acid

Powdered sugar

Instructions

Bring the sugar, water and cream of tartar to boil over medium-low heat. Stir gently until syrup reaches 310°F (155°C/hard crack stage) or is pale brown. Syrup should harden completely when dropped on to a cold plate and snap between the teeth when cold.

Pour the mixture onto an oiled heatproof work surface, and sprinkle with the citric acid.

Use a greased spatula to fold in the sides and thoroughly work the acid in.

When the candy is cool enough to touch but still pliable, roll it into sticks and snip off drop-sized bits.

Sift powdered sugar onto the candies, and shake to coat.

Allow to cool and harden completely. Store in an air-tight container.

Variations

• Reduce the citric acid to 2 teaspoons if you want a milder sour finish; the candy stays hard and crisp but tastes less sharp.
• Mix a small extra pinch of citric acid into the powdered sugar coating for a more tart surface and a drier finish.
• In the shaping step, roll thicker sticks and cut larger pieces if you want longer-lasting candies that dissolve more slowly.
• Pour the syrup into a lightly oiled rimmed pan instead of onto the work surface if you want flatter candies; they are easier to portion but less rounded.
• Swap the white granulated sugar for superfine sugar if that is what you have; it dissolves faster, with little change to the final texture.

Tips for Success

• Oil the heatproof work surface and grease the spatula before the syrup reaches temperature, because hard-crack syrup gives you very little working time.
• Keep the heat at medium-low so the syrup reaches 310°F before it darkens too much.
• Work the citric acid in thoroughly during the folding step so the sourness is evenly distributed.
• Start rolling and snipping as soon as the candy is safe to handle but still pliable; once it firms up, shaping gets difficult fast.
• Sift the powdered sugar instead of dumping it on, so the candies get a thin coating that prevents sticking.

Storage and Reheating

Store the candies in an air-tight container at room temperature, with parchment between layers if needed, for up to 3 weeks. Do not refrigerate or freeze; moisture and condensation will make the candy sticky and cloudy.

These do not need reheating. Serve them at room temperature, and if they start to clump, shake them with a little more powdered sugar to separate them.

FAQ

Do you need a candy thermometer for this recipe?

No, but it makes the hard-crack stage much more reliable. If you do not have one, use the cold-plate test in the recipe and make sure the syrup hardens fully and snaps when cold.

Why did the candy turn grainy?

That usually happens when sugar crystals form during cooking. Stir gently, avoid splashing crystals up the sides of the pan, and do not rush the boil.

Can you use less citric acid?

Yes. Reducing it to 2 teaspoons gives you a less aggressive sour finish without changing the candy’s structure much.

Why is the candy sticky after it cools?

It either did not reach 310°F or it picked up moisture after cooking. Store it only when fully hardened and keep it in a completely dry air-tight container.