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There’s something quietly satisfying about a loaf cake that looks plain on the outside and hides a ribbon of sweetness inside.
This matcha red bean loaf came out of a slow Sunday when I had leftover canned red bean paste and a tin of ceremonial-grade matcha I’d been meaning to use. The combination is classic in Japanese and Taiwanese bakeries for a reason. Earthy and subtly bitter meets smooth and sweet.
The batter is a simple one-bowl mix, no stand mixer needed. The red bean paste gets spooned down the center before baking, and it sinks just enough to create that clean swirl you see when you slice it.
It keeps well for two days at room temperature and gets better the next day once the matcha flavor deepens.
Why You’ll Love This Recipe
- Clean red bean ribbon visible in every single slice
- One bowl batter, no stand mixer required
- Matcha flavor deepens and improves overnight
- Uses pantry staples plus one tin of red bean paste
Ingredient Notes
- Matcha powder: Use culinary-grade or ceremonial-grade matcha for the best color and flavor. Cheap matcha goes dull and tastes grassy rather than smooth.
- Canned red bean paste (koshian or tsubuan): Koshian is smooth and spreads evenly, making a cleaner swirl. Tsubuan (chunky) works too and gives a more rustic look. Both are found in Asian grocery stores.
- All-purpose flour: Plain all-purpose flour keeps the crumb soft. Cake flour also works and gives a slightly finer texture.
- Neutral oil: I use sunflower or light vegetable oil. Melted coconut oil works and adds a very faint background note. Avoid strong-flavored oils like extra virgin olive oil.
- Whole milk: Full-fat milk keeps the crumb moist. You can swap in oat milk or soy milk for a dairy-free version with no noticeable difference in texture.
- Eggs: Two large eggs at room temperature help the batter emulsify smoothly. Cold eggs can cause the batter to look slightly curdled, but it bakes out fine.
Matcha Red Bean Loaf Cake
Ingredients
Method
- Heat the oven to 170 C / 340 F. Grease a 9x5 inch loaf pan with butter or oil and line it with parchment paper, leaving overhang on the long sides.
- Sift the flour, matcha powder, baking powder, and salt together into a bowl. Whisk to combine and set aside.
- In a large mixing bowl, whisk the sugar and eggs together until the mixture is pale and slightly thickened, about 2 minutes by hand.
- Add the milk, oil, and vanilla extract to the egg mixture. Whisk until smooth and fully combined.
- Add the sifted dry ingredients to the wet mixture and fold gently with a rubber spatula until just combined. Stop as soon as no dry streaks remain - do not overmix.
- Pour half the batter into the prepared loaf pan and spread it level.
- Spoon the chilled red bean paste in a line down the center of the batter, leaving a 2 cm gap at each short end. Gently press it down slightly.
- Pour the remaining batter over the red bean paste and spread it carefully to cover the filling completely.
- Bake for 48 to 52 minutes, until the top is set and a skewer inserted at the side of the loaf (away from the filling) comes out clean.
- Remove from the oven and cool in the pan on a wire rack for 15 minutes. Lift out using the parchment overhang and cool completely before slicing.
Notes
Tips for Success
- Sift the matcha with flour to prevent green clumps in the finished crumb.
- Chill the red bean paste for 20 minutes before using so it holds its shape when spooned into the batter.
- Do not overmix the batter after adding flour – stir until just combined to avoid a dense, rubbery loaf.
- Test doneness with a skewer inserted near the center edge, not through the red bean layer, for an accurate read.
- Let the loaf cool completely in the pan for 15 minutes before turning out, or the bean layer may tear.
Variations
- Swirl in 2 tablespoons of white sesame paste alongside the red bean for a nuttier flavor layer.
- Replace 20 g of flour with black sesame powder for a two-tone earthy batter with a darker crumb.
- Top the loaf with a thin white chocolate glaze and crushed freeze-dried raspberries before slicing.
Storage and Reheating
Store the cooled loaf wrapped tightly in plastic wrap or in an airtight container at room temperature for up to 2 days. The matcha flavor gets noticeably stronger and more rounded on day two.
For longer storage, wrap individual slices in plastic wrap and freeze for up to 6 weeks. Thaw at room temperature for about an hour or warm in a 160 C / 320 F oven for 8 minutes. Do not microwave, it dries the crumb out fast.
Refrigeration is not ideal for this loaf. The cold air stales the crumb faster than room temperature storage does.
Serving Suggestions
Slice it thick and serve alongside a bowl of hot hojicha or a straight green tea. The bitterness in both the tea and the matcha plays well against the sweet bean.
For a more indulgent serve, spread a thin layer of lightly salted butter on a warm slice. The salt pulls the matcha flavor forward in a way that feels intentional, not heavy.
This loaf also works cut into thin slices and served on a small board with fresh strawberries at a weekend brunch. The green and red contrast makes it look more considered than the effort involved.
FAQ
Why did my matcha loaf cake turn out a dull brown-green instead of bright green?
Low-quality matcha loses its color when exposed to heat and acid. Use culinary-grade or better matcha and make sure your baking powder is fresh. Overmixing can also knock air out and affect the final color slightly.
Can I use homemade red bean paste instead of canned for this loaf?
Yes, homemade anko works well. Make sure it is thick enough to hold a shape when spooned, not runny, or it will dissolve into the batter during baking. Chill it first if it is soft.
How do I know when the matcha red bean loaf is fully baked?
Insert a skewer at the side of the loaf, away from the red bean center, and it should come out clean. The top will be set and spring back lightly when pressed. An internal temperature of 90 C / 195 F also confirms it’s done.
Can I freeze matcha red bean loaf cake with the bean filling intact?
Yes, it freezes well. The red bean paste holds its texture after freezing and thawing better than most fillings. Slice before freezing so you can pull out individual portions easily.
Is matcha red bean loaf cake gluten-free?
Not with this recipe as written, since it uses all-purpose flour. You can substitute a 1-to-1 gluten-free baking flour blend. Results will be slightly denser but the matcha and red bean flavors come through just as well.
What is the difference between koshian and tsubuan red bean paste in this loaf?
Koshian is smooth and creates a clean, even ribbon through the loaf. Tsubuan is chunky with whole bean pieces, which gives a more textured, rustic center. Both taste great here – it comes down to the look you want when sliced.
