The Forktionary Angle
"The quintessential tart brightener for desserts and drinks."
Definition
The juice extracted from small, aromatic key limes, known for its intense tartness and distinct floral zest.
Sensory Profile
Technical Metrics
Origin
Florida Keys (historically)
Primary Use
Key Lime Pie
Typical pH Level
~2.0-2.3 (highly acidic)
Nutrition Facts
Per 15 mL (1 tbsp)Chef’s Secret
For maximum juice yield, warm key limes briefly in the microwave (10-15 seconds) and roll them firmly on a counter before cutting and squeezing.
Substitutions
Lime Juice (Persian)
1:1Most common substitute, slightly less aromatic but widely available.
Lemon Juice
1:1More tart, less floral than key lime, but provides similar acidity.
Bottled Key Lime Juice
1:1Convenient, but fresh juice has superior flavor and aroma.
Citric Acid Solution
For pure acidity, lacks the floral notes and complexity of fresh juice.
Buying Guide
Fresh key limes are best. Look for small, firm, slightly yellowish-green limes. Bottled juice should be 100% juice without added sugars.