Preheat oven to 325°F (165°C) and grease a 10-inch bundt pan.
In a large bowl, beat butter and sugar until light and fluffy.
Add eggs one at a time, mixing well after each addition.
Stir in lemon zest and lemon juice.
In another bowl, whisk together flour, baking powder, baking soda, and salt.
Gradually add dry ingredients to the butter mixture, alternating with buttermilk, until fully combined.
Pour batter into the prepared bundt pan and bake for 55-60 minutes or until a toothpick comes out clean.
Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
For the glaze, mix 1 cup powdered sugar with 2-3 tablespoons lemon juice and drizzle over the cooled cake.