How to Use the Hullster Tomato Corer for Perfect Tomatoes
By Chef'n | Clever Tools for Happy Kitchens | Published: 2026-10-30
Category: How-to Guides
Learn how to use the Chef'n Hullster Tomato Corer to quickly and cleanly remove tomato cores for canning, stuffing, or fresh prep.
Quick answer
Push the button to extend the serrated blades, insert around the core, release the button, twist, and lift out the core cleanly.
Why the Hullster works differently
Unlike a knife or spoon, the Hullster's spring-loaded serrated blades grip the core from the sides rather than cutting through the flesh. This reduces bruising and leaves a neat cavity—ideal for stuffed tomatoes or uniform slices for canning.
The tool is designed specifically for tomatoes, so it may not work as well on firmer fruits like apples or pears. Stick to ripe or semi-ripe tomatoes for best results.
Choosing the right tomato
The Hullster works best on medium to large tomatoes (Roma, beefsteak, or heirloom varieties). Small cherry or grape tomatoes may not have enough surface area for the blades to grip the core properly.
If the tomato is overripe and very soft, the core may break apart during removal. In that case, use a paring knife instead and save the Hullster for firmer specimens.
Step-by-step: How to core a tomato with the Hullster
- 1. Position the Hullster over the stem end: Hold the tomato steady on a cutting board. Place the tip of the Hullster directly over the center of the stem scar. The serrated blades should be fully retracted before you start. Common mistake: placing the tool off-center. The core is directly under the stem scar, so align carefully.
- 2. Push the button to extend the blades: Press the button on top of the Hullster to extend the stainless steel serrated blades outward. Keep the button pressed while you insert the blades around the core. Checkpoint: if the blades don't extend fully, the mechanism may be blocked by debris. Rinse the tool and try again.
- 3. Insert and release the button: Push the extended blades into the tomato around the core—about 1/2 to 3/4 inch deep depending on tomato size. Release the button so the blades retract and grip the core. Common mistake: releasing the button too early or too late. Wait until the blades are fully around the core before letting go.
- 4. Twist and lift out the core: Give the Hullster a quarter-turn (90°) to loosen the core from the surrounding flesh, then lift straight up. The core should come out cleanly with minimal tomato flesh attached. Checkpoint: if the core tears, the tomato may be too soft. Switch to a knife for that tomato and use the Hullster on firmer ones.
About this tool
- Hullster Tomato Corer: The Hullster Tomato Corer emulates the iconic design of the StemGem, with a push-button mechanism that extends stainless steel serrated blades around the core. This design lets you remove the core in one clean motion without digging into the flesh, saving time and keeping the tomato intact.
Hullster Tomato Corer
