Acid Drops

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Introduction

Acid drops are sour hard candies made by cooking sugar to the hard-crack stage, then working in citric acid while the mixture is still warm and pliable. The result is a snappy, intensely tangy sweet that you roll and snip into bite-sized pieces, then coat with powdered sugar. This recipe takes about 30 minutes from start to finish and requires only basic kitchen equipment.

Recipe Details

• Prep Time: 5 minutes
• Cook Time: 25 minutes
• Total Time: 30 minutes
• Servings: About 40 candies

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

1. 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.
2. Pour the mixture onto an oiled heatproof work surface, and sprinkle with the citric acid.
3. Use a greased spatula to fold in the sides and thoroughly work the acid in.
4. When the candy is cool enough to touch but still pliable, roll it into sticks and snip off drop-sized bits.
5. Sift powdered sugar onto the candies, and shake to coat.
6. Allow to cool and harden completely. Store in an air-tight container.

Variations

Deeper color and molasses note: Cook the syrup to 320°F instead of 310°F—it will turn amber rather than pale brown and develop a subtle toasted flavor, though the candy will be slightly less brittle.

Milder sour: Reduce the citric acid to 2 tsp (10 mL) if you prefer a less sharp tang, or increase to 1½ Tbsp (22.5 mL) for extra pucker.

Fruit flavoring: Add ½ tsp (2.5 mL) of powdered fruit juice concentrate or finely grated citrus zest when you fold in the citric acid—lemon, lime, or raspberry work well and complement the sour notes.

Colored coating: Mix a pinch of food coloring into the powdered sugar before coating the candies for a tinted finish that matches your flavor variation.

Larger candies: Instead of snipping into drops, roll the cooled candy into marble-sized balls and coat those—they’ll last longer in your mouth and have a more satisfying crack.

Tips for Success

Use a reliable thermometer. The difference between 310°F and 320°F is just 10 degrees, but it changes the texture noticeably. A candy thermometer clipped to your pot removes guesswork.

Don’t skip the cream of tartar. It prevents the sugar from crystallizing while the syrup cooks, ensuring a clear, glassy candy rather than a grainy one.

Work the acid in thoroughly while the mixture is still warm. If you wait too long and the candy hardens too much, folding becomes difficult and the acid won’t distribute evenly, leaving some pieces sour and others bland.

Oil your work surface and spatula generously. Undergreasing is the most common cause of sticky, difficult-to-handle candy. A light coat of neutral oil (vegetable, canola, or coconut) prevents sticking without affecting flavor.

Test the hardness on a cold plate before committing. Dropping a small amount onto a plate chilled in the freezer lets you confirm the syrup has reached hard-crack stage before you pour the whole batch.

Storage and Reheating

FAQ

Can I use a different acid instead of citric acid?

Citric acid is the standard choice because it’s food-safe, shelf-stable, and widely available. Tartaric acid (cream of tartar powder) can substitute at the same weight, but avoid vinegar or lemon juice—their moisture content will ruin the candy texture.

Why did my candy turn grainy instead of clear?

Granulation happens when sugar crystals form during cooking, usually because the pot was jostled or the sugar wasn’t fully dissolved before the boil. Stir gently but thoroughly at the start, then avoid stirring once the syrup is at a rolling boil. The cream of tartar helps prevent this, so don’t omit it.

How do I know when the candy is cool enough to handle?

It should feel warm to the touch but not hot—you can hold it briefly without burning yourself. If it’s still too hot, it will be too sticky to roll; if it cools too much, it will be brittle and hard to shape. You have a narrow window of about 2–3 minutes, so work quickly.

Can I make these ahead for gifts?

Yes. Wrapped individually in small cellophane or wax paper, they keep for 2 weeks in an air-tight container at room temperature and travel well. They don’t require refrigeration and won’t spoil, making them ideal for advance preparation or mailing.