Adjust the oven rack to the lower middle position, and then preheat to 375 degrees Fahrenheit. Line a 12 cup muffin pan with muffin liners.
Sift together the 200 grams all-purpose flour, 175 grams whole wheat flour, 1 teaspoon baking soda, and ¼ teaspoon salt.
200 grams all-purpose flour, 175 grams whole wheat flour, 1 teaspoon baking soda, ¼ teaspoon salt
In the bowl of an electric mixer fitted with the paddle attachment, beat the 140 grams cultured unsalted butter, 100 grams evaporated cane sugar and 1 teaspoon lemon zest until light and fluffy (about 3 minutes).
140 grams cultured unsalted butter, 100 grams evaporated cane sugar, 1 teaspoon lemon zest
Mash the 300 grams bananas, 2 large eggs, 1 cup plain yogurt and 1 tablespoon lemon juice together until the mixture is uniform and there are no lumps (a hand blender will speed this up).
300 grams bananas, 2 large eggs, 1 cup plain yogurt, 1 tablespoon lemon juice
With the mixer running at medium speed, slowly pour in ⅓ of the banana mixture to the butter.
Turn off the mixer and add half the flour mixture, mixing at low speed until just combined. Continue alternating the banana mixture and flour mixture until they are both added.
Spoon the batter into the prepared muffin tin, dividing evenly, and then put the pan in the oven. Bake until the muffins are golden brown and a toothpick inserted into the center of one comes out clean (about 20-25 minutes).
Let the lemon banana muffins cool until they are cool enough to handle and serve warm.