Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with a parchment sling.
Mash bananas in a large bowl until mostly smooth with small lumps.
Whisk in melted butter, granulated sugar, brown sugar, eggs, vanilla, and yogurt until glossy and combined.
Combine flour, baking soda, baking powder, salt, cinnamon, and espresso powder in a separate bowl.
Add dry ingredients to the banana mixture. Stir gently just until no flour streaks remain.
Fold in chocolate chips and walnuts, if using, until evenly distributed.
Scrape batter into the prepared pan and smooth the top. Tap the pan once to release air bubbles.
Bake 50–60 minutes, until a toothpick comes out with a few moist crumbs but no wet batter.
Cool in the pan for 15 minutes. Lift out, then cool completely on a rack before slicing.
Notes
Variation: Swap half the chocolate chips for mini chips or chopped dark chocolate. For muffins, divide batter among a lined 12-cup tin and bake 18–22 minutes. Storage: Wrap tightly and keep at room temperature up to 3 days or freeze slices up to 2 months.This recipe is an original creation inspired by classic Banana Espresso Chocolate Chip Bread Recipes flavors. All ingredient ratios and instructions are independently developed.