Preheat the oven to 350°F. Line an 8 x 8-inch baking pan with parchment paper and set aside. In a small bowl, combine the milk and lemon juice. Stir and set aside.
125 grams (1/2 cup) Whole milk,, 1 teaspoon Lemon juice
In a large bowl, use a hand mixer to cream together the unsalted butter, granulated sugar, and brown sugar on low speed for 2 to 3 minutes, until pale and fluffy.
60 grams (1/4 cup) Unsalted butter,, 50 grams (1/4 cup) Granulated sugar, 25 grams (2 tablespoons) Brown sugar
Add the mashed bananas, oil, eggs, vanilla extract, cinnamon, baking powder, baking soda, and salt. Mix on low speed until everything is fully combined.
372 grams (3 large) Extra ripe bananas,, 2 tablespoons Canola oil (or any neutral oil), 2 Large eggs,, 1 teaspoon Vanilla extract, 1 teaspoon Ground cinnamon, 1 teaspoon Baking powder, 1/2 teaspoon Baking soda, 1/4 teaspoon Salt
Switch to a spatula. Fold in half of the flour, then add half of the milk mixture. Repeat with the remaining flour and milk, gently folding after each addition. Mix just until the flour is incorporated—do not overmix.
240 grams (2 cups) All-purpose flour
Pour the batter into the prepared pan. Bake for 30 to 40 minutes, or until a toothpick inserted in the center comes out clean. Let the cake cool completely on a wire rack before slicing and serving.