
Black sesame paste mochi is a traditional Japanese dessert that's surprisingly easy to make at home.
To start, you'll need to prepare the black sesame paste, which is made by grinding black sesame seeds into a fine paste.
The ratio of black sesame seeds to sugar is crucial, as too much sugar can overpower the nutty flavor of the sesame.
In this recipe, a 3:1 ratio of black sesame seeds to sugar is used, which provides the perfect balance of flavors.
You'll also need to make the mochi dough, which is made from glutinous rice flour and water.
Related reading: Buy Sesame Seeds
What Is?
Black sesame mochi is an arranged version of a Hawaiian dessert, the butter mochi cake. It's like a cross between Japanese mochi and cake with a bouncy, chewy, and squishy texture.
This unique dessert is naturally gluten and dairy free, thanks to the glutinous rice flour used in its making.
Ingredients and Preparation
To make black sesame paste mochi, you'll need the right ingredients. The most essential ones are black sesame seeds or powder, glutinous (sweet) rice flour, and coconut milk.
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You can use either raw or toasted black sesame seeds, but keep in mind that toasted ones have a nuttier flavor. If you want to skip the roasting step, you can buy powdered black sesame seeds instead.
For the glutinous rice flour, look for popular brands like Mochiko Blue Star Sweet Rice Flour by Koda Farms or Thai Erawan Glutinous Rice Flour. This type of flour will give your mochi that characteristic chewy, bouncy texture.
You'll also need coconut milk, which is a crucial ingredient in making mochi cake. Canned milk is easier to find and cheaper than fresh milk, especially if you live in a place with limited land-grazing cattle, like Hawaii.
Here's a breakdown of the ingredients you'll need:
- Black sesame seeds or powder
- Glutinous (sweet) rice flour
- Canned coconut milk
- Optional: coconut extract for extra coconut aroma and flavor
Remember, using refined coconut oil or vegan butter is a good substitute for coconut oil, especially if you want to avoid the coconut fragrance.
Making the Mochi
Mochi dough typically consists of glutinous rice flour, which is made from short-grain rice that's high in starch.
To make black sesame paste mochi, start by mixing glutinous rice flour with water to form a dough.
Glutinous rice flour is highly absorbent, so it's essential to use the right ratio of flour to water to achieve the perfect consistency.
A good rule of thumb is to use a 1:1 ratio of flour to water, but this may vary depending on the specific type of flour used.
Knead the dough for about 10 minutes to develop the gluten and create a smooth, pliable texture.
The kneading process helps to break down the starches in the flour, making the dough easier to work with.
Black sesame paste is then added to the dough, creating a beautiful marbled effect.
The amount of black sesame paste used will depend on personal preference, but a general rule of thumb is to use about 1/4 cup of paste for every 2 cups of dough.
The black sesame paste adds a rich, nutty flavor to the mochi, as well as a beautiful dark color.
For your interest: Black Bean Paste Recipe
Filling and Filling Ingredients
Traditionally, mochi is filled with anko or red bean paste, but nowadays you can find mochi in almost any flavor. Black sesame paste is a popular filling option for mochi.
The black sesame filling is made with toasted black sesame seeds, which have been used in East Asian desserts for centuries. Black sesame is a healthy and nutritious ingredient rich in calcium, antioxidants, and protein.
To make the black sesame filling, you'll need the following ingredients: ½ cup toasted black sesame seeds, ¼ cup granulated sugar, 3 tablespoons unsalted butter or coconut oil, and 3 tablespoons water. You can also use raw black sesame seeds, but toasting them enhances the flavor.
Here are the ingredients you can use to make black sesame filling:
- Black Sesame: ½ cup toasted black sesame seeds
- Sugar: ¼ cup granulated sugar (or less if you prefer the filling less sweet)
- Oil: 3 tablespoons unsalted butter or coconut oil
- Water: 3 tablespoons water
Honey, maple syrup, or agave syrup can be used to sweeten the black sesame paste filling.
Cooking and Storage
To make black sesame paste mochi, you'll need to store the black sesame seeds properly before grinding them into a paste.
Black sesame seeds can be stored in an airtight container in the refrigerator for up to 6 months.
For optimal flavor and texture, grind the black sesame seeds into a paste just before using them in your mochi recipe.
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2 Methods of Cooking

Cooking and storage are key to enjoying fresh mochi. The traditional way of cooking mochi takes about 15-20 minutes by steaming the batter until it turns translucent and vibrant in color.
Steaming is a great way to cook mochi if you have the time. If you stick a chopstick through the center of the mochi, it should come out clean.
The microwave is a convenient alternative for those in a hurry. Simply place the mochi batter in a microwavable bowl, cover it with plastic wrap, and poke a few holes in the wrap.
Microwaving takes only about 2 minutes, or until the mochi turns translucent and vibrant in color.
How to Maintain Softness
To maintain softness, it's essential to understand that the amount of sugar you use plays a crucial role. The more sugar you add to the dough, the longer your mochi will stay soft.
Using too little sugar can result in mochi that becomes hard and brittle quickly. I've seen this happen before, and it's a bummer.

The looseness of the mochi batter is also a determining factor. Adding more water or liquid to the batter will make your mochi softer, but be careful not to make it too soft, as it can be difficult to shape.
Freezing the black sesame filling is also a game-changer. By freezing it semi-solid and then balling it up, you'll end up with a mochi that's less likely to become a mess.
Work When It's
Working with hot mochi dough is key to a successful mochi-making experience. This is especially true when it comes to handling the dough after it's cooked through.
Transfer the hot mochi dough onto a sheet pan generously dusted with cornstarch. This helps prevent the mochi from sticking to the surface.
Pinch off a 2-inch ball of mochi, rather than tearing it, to avoid creating a sticky mess. This is crucial when working with mochi dough that's still warm.

Here's a quick rundown of the steps to follow:
Letting the mochi cool slightly will make it more comfortable to handle, but be careful not to let it get too cool, or it'll be difficult to stretch and roll out.
Comments on Butter
Monica suggested using 1 tsp of baking powder instead of 1 tbsp, which resulted in a chewier texture.
Nga agreed with Monica's suggestion, stating that 1 tsp of baking powder is likely the correct amount.
Katherine tried using 1 and 1/2 tsps of baking powder and found it to be the best choice, resulting in a perfect texture.
If you're unsure about the baking powder amount, it's worth noting that different recipes may have varying amounts, and it's always a good idea to consult with others who have tried the recipe.
Here's a summary of the baking powder amounts mentioned:
- 1 tsp (Monica)
- 1 and 1/2 tsps (Katherine)
- 1 tbsp (initial recipe)
Zoe, a first-time attempter at making butter mochi, asked about the consistency of the dough before cooking it, and wondered if it should be on the loose side.
Tips and Variations
To make the most of your black sesame paste mochi, it's essential to toast sesame seeds before grinding them. Don't skip this step, as it'll result in a more nutty and flavorful paste.
For the best results, grind sesame seeds well until they release oil and look sticky. Be cautious not to overpulse, or you'll end up with tahini paste instead.
To ensure the cake releases easily from the pan, oil it generously with a pastry brush or paper towel dipped in oil.
Here are some tips to help you achieve the perfect black sesame paste mochi:
You can also experiment with different sweeteners, such as maple syrup, agave syrup, or brown rice syrup, instead of honey to sweeten the black sesame paste.
Pro Tips
To get the best results, don't skip toasting sesame seeds - it's essential for that nutty flavor.
The key to grinding sesame seeds is to pulse them until the oil starts to release and they look sticky. This will give you a powder-like texture that clumps and sticks together.

You'll want to oil the pan generously to ensure the cake releases easily. A pastry brush or paper towel dipped in oil works well for this.
Cakes are notoriously hard to slice when hot, so be sure to let it cool for at least an hour before cutting.
A serrated knife is your best bet for slicing the cake - it's much easier than using a regular knife.
Recipe Variations
If you're looking to mix things up, there are some great variations you can try. You can swap out black sesame seeds for regular brown sesame seeds, which will give your cake a slightly different flavor and texture.
To toast sesame seeds, don't skip this crucial step! For extra nutty and flavorful sesame seeds, toast them until they're fragrant and lightly browned. You can also use different sweeteners to give your cake a unique flavor. Honey, maple syrup, agave syrup, or brown rice syrup are all great options.
If you want to add some extra crunch to your cake, you can try adding some toasted sesame seeds on top. Just be sure to toast them first, as this will bring out their flavor and texture.
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