Soft and chewy purple ube mochi filled with a sweet and creamy ube custard
What is ube?
If you aren't familiar with ube, it is a purple root vegetable originating in the Philippines. It has a sweet, slightly nutty, vanilla-y taste and is commonly used in desserts.
Ube is often confused with taro and purple sweet potato. Taro is not as vibrant in color and sweetness and is used more often in savory dishes. On the other hand purple sweet potato has a more intense purple colour and sweetness. If you can't find ube, purple sweet potato is often a great alternative.

Ingredients
Ube Filling
- Whole milk: Milk makes up the body of the custard. I prefer to use whole milk as it has a creamier flavor and texture, but skim and non-fat milk work great too.
- Ube extract: Ube extract brings all the ube flavor to the custard! A little goes a long way so don't add too much.
- Cornstarch: Cornstarch acts as the thickener in the custard. It may seem like a lot but we want the filling to be super thick so it can easily wrapped in the mochi skin.
- Granulated sugar: Sugar sweetens the filling! Feel free to increase or decrease this according to your personal preference.

Mochi
- Glutinous rice flour: You can use mochiko flour, which is made from Japanese short-grain rice, aka mochigome, or Thai-style glutinous rice flour which can be found in almost all Asian grocery stores.
- Granulated sugar: Aka white sugar, is used to sweeten the mochi dough as well as give it a softer texture.
- Cornstarch: Cornstarch helps to thicken the mochi dough as well as give it more structure.
- Whole milk:Â Milk is used to hydrate the dough as well as add extra fat and protein to the dough, this results in a softer mochi with a smoother mouthfeel. If you want to make this dairy-free you can replace this with water.
- Vegetable oil: Kneading vegetable oil into the dough not only makes it softer and chewier it also makes it easier to handle as it'll be less sticky.
- Corn starch or potato starch, for dusting

Frequently Asked Questions
How long does this last?
Mochi is always best eaten the day that it is made as the skin is the softest and stretchiest. However, they will last up to 2 days when stored in an airtight container in the fridge. Anything made with glutinous rice flour will start to harden up as it sits.
How do I store ube mochi?
The best way to store any leftover mochi is in an airtight container in the fridge. As the custard is made out of milk it's important to keep it refrigerated otherwise it runs the risk of spoiling.
Can I freeze mochi?
You can freeze leftover mochi, and it will keep for up to a week in the freezer. When you are ready to eat just let it defrost on your countertop, or with quick 5-10 second bursts in the microwave.
Keep in mind that the texture won't be exactly the same as it was before frozen. The mochi will be a little harder and less stretchy.
Can I use coconut milk instead of regular milk?
Yes, you can! Ube and coconut is a common flavor combination and coconut milk is a great alternative when making both the mochi and custard. You can even roll the finished mochi in desiccated coconut for an even coco-nuttier mochi!

Can I use ube powder or ube halaya to flavor the mochi?
If you have access to either of these they would be an even better option than ube extract!
You can replace the ube custard filling directly with ube halaya for an ube jam filling. As for the ube powder you can add it to the ube custard filling to give it more structure and a natural ube flavor.
Why is my mochi so stiff?
There are a couple of reasons for stiff mochi:
- The mochi dough was overcooked
- Not enough liquid was added to the mochi
- The mochi hasn't been kneaded with vegetable oil for long enough
Ube isn't the ube filling thickening?
Making sure the ube filling is thick is important if you want to be able to scoop it up and fill the mochi.
Here are a couple of reasons why it's not thickening:
- Not enough cornstarch was used
- The heat is too low
- The filling hasn't been cooked for long enough- keep stirring!

Let's Get Cooking!
Ube lovers this is the chewiest, stretchiest ube sweet treat you'll eat!
If you liked this recipe make sure to leave me a comment and rating down below, I would love to know how you went.
Also, don't forget to tag me on Instagram @catherine.desserts and hashtag #cattycakes so I can see and share your desserts. Follow me on Facebook, Pinterest, Youtube, and TikTok for more of my baking creations and updates! Until next time... happy caking!
Print📖 Recipe
Ube Mochi
Soft and chewy purple ube mochi filled with a sweet and creamy ube custard
- Prep Time: 30 minutes
- Cook Time: 5 minutes
- Total Time: 35 minutes
- Yield: 8 Mochi 1x
- Category: Mochi
- Method: Easy
- Cuisine: Asian
Ingredients
Ube Filling
- 360ml Whole milk (1 ½ cups)
- ¼ tsp Ube extract
- 30g Cornstarch (¼ cup)
- 65g Granulated sugar (â…“ cup)
Mochi
- 200g Glutinous rice flour (1 ½ cup)
- 65g Granulated sugar (â…“ cup)
- 40g Corn starch (â…“ cup)
- 360ml Whole milk (1 ½ cup)
- ¼ tsp Ube extract
- 1 ½ tbsp Vegetable oil
Assembly
- Corn starch or potato starch, for dusting
Instructions
Ube Filling
- Heat the milk in a medium-sized pan over medium heat until steaming
- Combine the cornstarch and granulated sugar together in a bowl and whisk to combine
- Add the dry ingredients to the milk and whisk until smooth
- Add the ube extract and mix until combined
- Continue to mix over medium heat for approx 5-10 minutes, or until the ube filling mixture has thickened to a thick custard-like consistency
- Remove from the heat, transfer to a bowl, cover with cling wrap and cool completely
Mochi
- Combine the glutinous rice flour, sugar, and cornstarch in a medium-sized microwave-safe bowl, and whisk to combine
- Add the milk and ube extract, and whisk until smooth
- Cover the mochi mixture with cling wrap and microwave for 2 minutes on high
- Uncover and stir
- Then re-cover and microwave for another 2 minutes, the mochi dough should be semi-translucent
- If the mochi is still slightly liquidy/milky re-cover it and microwave at 1-minute intervals until cooked through
- Allow the mochi to room temperature, or until it's cool enough to handle
- Add the vegetable oil and using gloved or oiled hands knead until smooth
- Prepare a baking tray lined with parchment paper
- Divide the mochi into 8 equal portions and place on the baking sheet.
Assembly
- Prepare a shallow bowl with cornstarch
- Using oiled or gloved hands flatten a portion of mochi between your palms and scoop 1 tablespoon of the ube filling into the centre
- Bring the edges of the mochi together to enclose the filling and roll it into a ball
- Dust the ball in cornstarch and repeat with the remaining filling and mochi
- Dust off any excess cornstarch from the mochi balls and enjoy!
Keywords: ube, purple yam, sweet potato, root vegetable, mochi, glutinous rice, custard
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