Start by preheating your oven to 350F
In a large bowl add your ripe bananas and mash until smooth
Once your bananas are mashed add your melted butter, brown sugar and granulated sugars
Once combined add in your egg and vanilla extract
Lastly add your greek yogurt and mix
In a separate bowl add your dry ingredients and mix
Add your dry to your wet and fold to combine
Place your batter in a lined muffin tin
In a separate bowl add all your ingredients for your streusel topping and mix with your hands until a crumbly texture forms
Top your muffins with streusel and place in the oven for 22 minutes
