How to Make Fermented Tamarillo
Lacto-fermented tamarillo (tree tomato) creates a unique tangy preserve that enhances the fruit's naturally sharp, tomato-like flavor with probiotic complexity.
Category: Fruits · Method: Lactic Acid · Time: 7-14d · Difficulty: 2/5 · Yield: varies · Temp: 18-22°C
History
Tamarillo originated in the Andes mountains of South America. It spread to New Zealand and Asia where it's now commonly grown and preserved in various ways.
Ingredients
- 6-8 fruits (approx. 500-600g) Ripe tamarillos — Red or yellow variety; skins removed
- 18-22g Sea salt — Calculated for a 2.5% brine concentration based on water volume
- 750ml (approx. 3 cups) Water — Non-chlorinated/filtered
- 1 tsp Chili flakes — Optional, for heat
Equipment
- Glass jar
- Fermentation weight
- Cutting board
- Sharp knife
- Saucepan
Instructions
Prepare tamarillos
Score a small 'X' on the bottom of each fruit. Blanch in boiling water for 30 seconds, then shock in ice water. Peel the skins away. You may quarter them or leave them whole if small. Removing seeds is optional but results in a smoother final product.
Time: 15 min
Tip: Wear an apron; red tamarillos stain surfaces and clothing easily.
Make 2.5% Brine
Dissolve 18-22g of sea salt into 750ml of room temperature water. Stir until the water is completely clear. If using chili flakes, add them directly to the jar before the brine.
Time: 5 min
Tip: Using a scale for salt is critical for safety and to prevent the fruit from becoming mushy.
Pack jar and headspace
Arrange tamarillo pieces in a clean quart jar. Pour the brine over the fruit, ensuring they are completely submerged. Leave at least 1-2 inches (2.5-5cm) of headspace at the top of the jar to allow for expansion and CO2 production.
Time: 5 min
Tip: Use a glass weight or a clean cabbage leaf to keep the fruit below the brine line.
Ferment and Gas Management
Seal the jar. If using a standard lid, 'burp' the jar daily by slightly loosening the lid to release built-up pressure, then re-tightening. If using an airlock, no intervention is needed. Store in a cool, dark place at 18-22°C.
Time: 4-10 days
Tip: Tamarillos have a high sugar content; start tasting at day 4. Move to cold storage as soon as the brine is cloudy and the fruit has a pleasant tang to preserve texture.
Fermentation Timeline
- Day 1-3: Brine penetration — Salt begins flavor transformation.
- Day 4-7: Active fermentation — Bubbles, tang develops.
- Week 2: Maturation — Flavors deepen and meld.
Signs of Success & Spoilage
Good signs
- Cloudy brine
- Sharp tang
- Firm texture
- Fruity aroma
Warning signs
- Mold
- Mushy fruit
- Off odors
- Pink scum
Troubleshooting
- Bitter taste
- Cause: Seeds included Solution: Remove seeds before fermenting.
Storage
Refrigerate in brine Keeps 3-4 months. Excellent in salsas and chutneys.
Health Benefits
- Probiotics
- Vitamin A
- Vitamin C
- Fiber
- Anthocyanins
Serving Suggestions
- Chutney base
- Taco topping
- Curry addition
- Cheese pairing
- Blended into sauces
Related Fruits Ferments
Other Lactic Acid Ferments
- Sauerkraut — Vegetable
- Kimchi — Vegetable
- Kefir — Dairy
- Pickles — Vegetable
- Yogurt — Dairy
- Hot Sauce — Condiment
- Water Kefir — Beverage
- Kraut-Chi — Vegetable