For best results, allow cold ingredients to come to room temperature first. Pre-heat oven to 400 degrees F. Line a standard 12-cup muffin tin with paper liners. If you can, snag parchment paper muffin liners <-- they're amazing and you'll have no crumbs left behind!
Chop cranberries by cutting the larger ones in quarters and the smaller ones in half. This is key for distributing all the cranberry goodness in each muffin! It seems daunting at first but goes by fast.
Measure flour using the spoon and sweep method or measure by weight for accuracy. Mix together dry ingredients in a medium bowl. Set aside.
In a small bowl, gently whisk eggs until just combined.
In a large bowl, add you mashed banana and use a hand mixer (stand mixer works too!) to beat the banana until little lumps remain. Add yogurt, oil, vanilla and whisked egg and beat until just combined.
Sprinkle half the flour mixture into the wet mixture and beat gently over medium-low until just starting to incorporate, then beat in remaining flour. Fold in chopped cranberries and white chocolate.
The batter will be a bit thick and sticky, don't fret. Divide batter evenly between 12 lined muffin cups. The batter will be almost to the top of each muffin liner but if you want a bakery-style muffin top, this is key.
Place on the center rack and bake at 400 (yup! 400!) for 18-22 minutes or until an inserted toothpick comes out dry + clean from the center of the muffin. Oven times will vary so check the muffins for doneness around the 18 minute mark. Mine were done in 20.
Allow to cool in the pan for 5 minutes then transfer to a wire rack to cool completely.
Notes
Baking the muffins at 400 F seems a little weird at first but it's key for getting a great rise and fluffy bakery-style results here.For best results allow muffins to cool before faceplanting. Leftover muffins are great the next day! I like to wrap them individually in plastic wrap and place in an airtight container on the counter.Nutrition Facts below are an estimate gathered using an online recipe nutrition calculator. Adjust as needed.