Use very ripe bananas with plenty of brown spots for the best natural sweetness, moisture, and banana flavor.

Glutinous rice flour, also called sweet rice flour, is essential for the signature chewy texture. Do not substitute regular rice flour or all-purpose flour.

Use full-fat coconut milk for a rich, creamy texture and pronounced coconut flavor.

Allow the melted butter to cool slightly before combining it with the eggs to prevent accidental cooking.

For chocolate chip banana butter mochi, replace the walnuts with ½ cup chocolate chips.

For toasted coconut banana mochi, add ⅓ cup toasted shredded coconut to the batter and optionally sprinkle additional coconut on top.

For a nut-free variation, omit the walnuts entirely.

For cinnamon sugar banana mochi, sprinkle a mixture of cinnamon and sugar over the batter before baking.

For a dairy-free variation, replace the whole milk with unsweetened coconut milk or another dairy-free milk and substitute plant-based butter for the unsalted butter.

For a Hawaiian-inspired variation, replace the walnuts with chopped macadamia nuts.

Allow the mochi to cool for at least 30 minutes before slicing. Cutting while hot may result in an overly sticky texture.

Keep covered at room temperature for no longer than 2 hours before refrigerating leftovers.

Store cooled leftovers in an airtight container in the refrigerator for up to 4 days. Separate squares with parchment paper to prevent sticking.

For longer storage, wrap individual squares tightly and freeze in a freezer-safe container for up to 2 months. Thaw overnight in the refrigerator before reheating.

To reheat in the microwave, warm individual squares in 10–15-second intervals until heated through. Avoid overheating.

To reheat in the oven, warm at 300°F (150°C) for approximately 8–10 minutes, until heated through and the edges become slightly crisp.

Serve slightly warm or at room temperature with coffee or tea for a comforting afternoon snack or dessert.