Preheat the oven at 180 grade Celsius.
In a large bowl, combine 125 grams of room temperature soft butter with 250 grams powdered sugar and 1 teaspoon of vanilla sugar. Beat with a mixer until fluffy.
Add three eggs one by one and mix until you have good composition and the eggs are well blended.
Add three mashed bananas and mix again.
Combine in a separate medium bowl 250 grams of white flour with 1 tablespoon of baking powder and a pinch of salt. Pour the flour over the egg composition. Beat slowly until moist.
Place 200 grams of blueberries in a bowl with 1 tablespoon of starch or white flour and toss to coat. Gently fold blueberries into the batter.
Spoon batter into the tray. Press additional blueberries into the top of the batter. Bake the blueberries banana bread at 180 grade Celsius for about 40 - 50 minutes or until ready.
Let it rest for about 20 mins. Enjoy it! Sweets & Hugs, TBW 🍰