Preheat your oven to 350°F and line a standard muffin tin with paper liners (or grease it well). In a small bowl, mash your ripe bananas until mostly smooth—a few lumps are totally fine. I like leaving banana pieces in there because they add texture. Measure out your yogurt and milk and set everything nearby.

In a large mixing bowl, cream together the butter and sugar until light and fluffy. This takes about 2–3 minutes with an electric mixer on medium speed. You'll see it go from pale yellow to almost white, and that's when you know it's ready. Scrape down the sides of the bowl with a spatula so nothing gets missed.

Add the eggs one at a time, beating well after each addition (about 30 seconds each). Pour in the vanilla powder and mix until combined. The mixture should look smooth and slightly thickened at this point, not separated. If it looks curdled, don't panic—it'll come together once you add the dry ingredients.

In a separate bowl, whisk together the flour, baking powder, and salt. Divide this dry mixture into three parts for easier mixing. Alternate adding dry ingredients and wet ingredients (banana-yogurt-milk mixture) to the butter mixture, starting and ending with the dry stuff. This prevents overmixing, which makes banana muffins tough instead of tender.

Stir in the honey until everything's combined, then fold in the chopped walnuts gently. Don't overstir once the flour's in—just mix until you don't see white streaks anymore. The batter should be thick but still pourable. If it looks watery, don't worry; it thickens up fast.

Divide the batter evenly among the 12 muffin cups, filling each about three-quarters full. I use an ice cream scoop to keep portions consistent, which also prevents overflow. Tap the muffin tin gently on the counter to release air bubbles. Mine always sticks a little to the pan and that's completely fine.

Bake for 22–25 minutes at 350°F until a toothpick inserted in the center comes out with just a few crumbs. The tops should look lightly golden brown. Don't overbake or they'll get dry—pull them out the second the toothpick test passes. Let them cool in the pan for 5 minutes, then transfer to a wire rack.