Tub-Tim Grob: The Jewel-Toned Delights of Thailand

The first time I encountered Tub-Tim Grob, or “ruby dumplings,” it was at a bustling night market in Bangkok. The air hummed with the energy of hawkers calling out their wares, the scent of grilled meats mingling with the sweet perfume of tropical fruits. But it was the vibrant crimson jewels bobbing in coconut milk that caught my eye. They looked like edible gemstones, a refreshing oasis in the humid heat, and the first bite – a burst of sweet, nutty crunch against the cool creaminess – sealed my love for this delightful Thai dessert. While I may not have always had red food coloring on hand, as you’ll see, even a slight variation couldn’t diminish the joy this dessert brings.

Recipe Overview

• Prep Time: 30 minutes
• Cook Time: 10 minutes
• Total Time: 40 minutes
• Servings: 2
• Yield: 2 servings
• Dietary Type: Vegetarian

Ingredients

• 1/2 cup water chestnut
• 1/4 cup water
• 1/2 cup tapioca flour
• 1/3 cup sugar
• 5 drops red food coloring (or blue, if you’re feeling adventurous!)
• 1/3 cup coconut milk
• Ice for ice bath
• Crushed ice for serving

Equipment Needed

• Cutting board
• Knife
• Mixing bowls
• Strainer
• Misting spray bottle
• Pot
• Microwave-safe cup

Instructions

1. Begin by preparing the water chestnuts. Take approximately 10-15 pieces.
2. Carefully slice each water chestnut into half, creating two round disks.
3. On each disk, make two cuts to divide it into six equally sized pieces. The goal is to create small, ruby-like segments.
4. Place the prepared water chestnut pieces into a bowl. Add the red food coloring (or blue!) and a teaspoon of water. Mix thoroughly to ensure the water chestnuts are evenly coated with color.
5. Drain the water chestnuts, discarding any excess liquid from the food coloring.
6. In a large bowl, measure out 1/2 cup of tapioca flour.
7. Add the colored water chestnuts to the bowl of tapioca flour. Gently shake the bowl to coat the water chestnuts completely with the flour.
8. Using a strainer, scoop the tapioca-coated water chestnuts to remove any excess flour.
9. Transfer the strained water chestnuts into another bowl.
10. Using a misting spray bottle, lightly spritz some water onto the water chestnuts. This will help the next layer of tapioca flour adhere properly.
11. Put the water chestnuts back in the flour bowl, and coat them with flour again. This double coating of tapioca flour is crucial for creating the distinctive chewy texture of the “rubies.”
12. Fill a pot with water and bring it to a boil.
13. Once the water is vigorously boiling, gently dump the coated water chestnuts into the pot. The cooked “rubies” will float to the surface, indicating they are done. This should only take a few minutes.
14. Use a strainer to scoop the cooked water chestnuts and immediately transfer them into a bowl of ice water. This step halts the cooking process and ensures they retain their chewy texture and vibrant color.
15. In a microwave-safe cup, combine 1/3 cup of sugar and 1/4 cup of water to create the syrup.
16. Microwave the cup for 3-4 minutes, depending on your microwave’s power, until the sugar is completely dissolved and the mixture has slightly thickened into a syrup.
17. Divide the cooked “rubies” into two equal portions and place them in separate serving bowls.
18. Carefully pour out the water from the bowls containing the “rubies.”
19. Add half of the coconut milk (about 1/6 cup) and half of the sugar syrup to each bowl.
20. Serve immediately with crushed ice.

Expert Tips & Tricks

• The Double Coating is Key: Don’t skip the second coating of tapioca flour. This is what gives Tub-Tim Grob its signature chewy texture.
• Ice Bath Matters: Immediately transferring the cooked water chestnuts to an ice bath is crucial for preventing them from becoming mushy. The cold water shocks them and helps them maintain their shape and texture.
• Customize the Sweetness: Adjust the amount of sugar syrup to your preference. If you prefer a less sweet dessert, start with a smaller amount and add more as needed.
• Flavor Infusion: Try infusing the sugar syrup with a pandan leaf for a delicate aromatic note. Simply add a pandan leaf to the sugar and water mixture before microwaving.
• Natural Coloring Alternatives: If you prefer to avoid artificial food coloring, you can use beet juice for a natural red hue. Just be aware that it may slightly alter the flavor.

Serving & Storage Suggestions

Tub-Tim Grob is best served immediately after preparation to enjoy the perfect combination of textures and temperatures – the cool, creamy coconut milk, the icy crushed ice, and the chewy, slightly crunchy “rubies.” If you have leftovers, store the “rubies” separately from the coconut milk and syrup in airtight containers in the refrigerator. They will keep for up to 2 days. When ready to serve, combine the “rubies” with fresh coconut milk and syrup, and add crushed ice. Avoid freezing, as it will alter the texture of the water chestnuts.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	253.6 kcal	N/A
Calories from Fat	78 g	31%
Total Fat	8.8 g	13%
Saturated Fat	7.8 g	38%
Cholesterol	0 mg	0%
Sodium	29.6 mg	1%
Total Carbohydrate	44.8 g	14%
Dietary Fiber	2 g	8%
Sugars	37.8 g	151%
Protein	1.8 g	3%

Note: Percent Daily Values are based on a 2,000 calorie diet. Nutritional information is an estimate and may vary based on specific ingredients and preparation methods.

Variations & Substitutions

• Vegan Tub-Tim Grob: Ensure your coconut milk is plant-based. This recipe is naturally vegan!
• Different Food Coloring: Experiment with different food colorings to create a visually stunning dessert. Green (pandan extract) or yellow (turmeric) are other popular choices.
• Other Starches: While tapioca flour is traditional, you could experiment with other starches like potato starch or cornstarch, though the texture may be slightly different.
• Alternative Sweeteners: If you’re looking for a lower-sugar option, try using a natural sweetener like stevia or monk fruit to make the syrup.
• Aromatic Variations: Add a few drops of rose water or orange blossom water to the coconut milk for a fragrant twist.

FAQs (Frequently Asked Questions)

Q: Why are my water chestnuts not turning bright red?
A: Make sure you are using a concentrated food coloring. Also, ensure the water chestnuts are completely dry before adding the food coloring, as excess water can dilute the color.

Q: Can I make this ahead of time?
A: Yes, you can prepare the water chestnuts and sugar syrup ahead of time and store them separately in the refrigerator. However, it’s best to assemble the dessert just before serving to prevent the water chestnuts from becoming soggy.

Q: What if I don’t have access to fresh water chestnuts?
A: Canned water chestnuts can be used as a substitute, but they may not have the same crisp texture as fresh ones. Drain and rinse them thoroughly before using.

Q: How do I prevent the tapioca flour from clumping?
A: Make sure the water chestnuts are slightly damp before coating them with the tapioca flour. This will help the flour adhere properly and prevent clumping.

Q: Can I use a different type of milk instead of coconut milk?
A: While coconut milk is traditional, you can experiment with other types of milk, such as almond milk or soy milk. However, the flavor will be different.

Final Thoughts

Tub-Tim Grob is more than just a dessert; it’s a celebration of textures, flavors, and vibrant colors. From the satisfying crunch of the water chestnuts to the cool, creamy sweetness of the coconut milk, every bite is a delightful sensory experience. Don’t be afraid to experiment with the colors and flavors to create your own unique version of this classic Thai treat. I encourage you to try this recipe and share your experiences, and perhaps pair it with a refreshing glass of iced Thai tea. Enjoy the journey of creating this edible gem!