Soak the walnuts in milk for 10-15 minutes.

Sift together flour, soda, baking powder, cinnamon powder in a big bowl.

Melt butter and mix sugar. Puree the bananas and beat the eggs separately. Make a well in the dough ball and stir in eggs and butter.

Then add the banana puree, add milk if required. Pre heat the oven at 180°C. Line the muffin tray with muffin liners or grease lightly with butter.

Pour the batter up to 1/2 of capacity and place the walnut kernel on top. Bake for 40-45 minutes. Remove from oven and let them cool on wire rack.

PS- I soaked the walnuts so as to avoid them getting dry from top.