Preheat the oven to 350 degrese F.
Grease a bundt cake pan with cooking spray and then sprinkle evenly with about 2 tablespoon of granulated sugar. Set aside.
In a large bowl with an electric mixer, beat together the butter and sugar until creamy, about 2 minutes.
Add the eggs, one at a time, mixing until well combined and scraping down the edges as necessary.
Add the oil, vanilla, and mashed bananas, mixing until combined.
Add the baking soda, cinnamon, and salt, mixing until combined.
Add half of the flour and mix to combine.
Add half of the Greek yogurt, and mix to combine. Repeat with remaining flour and Greek yogurt.
Pour the batter into the prepared bundt pan.
Bake in the preheated oven for 50-60 minutes, until golden brown on the top and a toothpick comes out clean.
Let cool for about 10 minutes in the pan. Run a knife around the egdes and flip onto a cooling rack to cool completely.