Preheat your oven to 350°F (175°C), middle rack position. If you are using a Mosaic Non-Stick Bundt Pan, no need to grease the pan. Otherwise, grease and flour a standard bundt pan.
In a large mixing bowl, with a handheld electric mixer, beat the softened butter and granulated sugar together until light and fluffy, about 3–4 minutes.
Add the eggs, one at a time, mixing well after each addition. Then, stir in the vanilla extract. Set aside.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
Gradually add the flour mixture to the wet ingredients, alternating with the buttermilk, beginning and ending with the flour mixture. Mix until just combined, being careful not to overmix. Scrape down all the excess batter with spatula.
Using an ice cream scoop, scoop the batter evenly into the prepared Mosaic Non-Stick Bundt Pan and spread it evenly with a spatula.
Bake in the preheated oven 350F (175 °C) for 45–55 minutes, or until a toothpick inserted into the centre comes out clean.
Allow the cake to cool in the pan for 10 minutes, then invert it onto a wire rack to cool completely.