Step 1: Preheat your oven to 350°F (175°C).
Step 2: Generously grease your Bundt pan with butter or non-stick spray, and lightly dust it with flour.
Step 3: In a large mixing bowl, whisk together the flour, baking powder, baking soda, salt, and sugar until well combined. Set aside.
Step 4: In another bowl, beat the softened butter with an electric mixer until creamy. Gradually add the sugar and continue to beat until light and fluffy.
Step 5: Add the eggs, one at a time, mixing well after each addition. Stir in the vanilla extract until fully incorporated.
Step 6: Alternately add the dry ingredient mixture and the buttermilk to the butter mixture, starting and ending with the dry ingredients. Mix until just combined.
Step 7: Pour the batter into the prepared Bundt pan and smooth the top. Bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean.
Step 8: Let the cake cool in the pan for about 10-15 minutes, then invert onto a cooling rack to cool completely.
Step 9: While the cake is cooling, whisk together the glaze ingredients in a small bowl until smooth.
Step 10: Once the cake is completely cool, drizzle the glaze over the top.