01 - Preheat oven to 350°F. Grease and lightly flour a 10-cup bundt pan, then tap out excess flour.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
03 - In a large bowl, beat butter and sugar until light and fluffy, about 3 to 4 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in lemon zest and vanilla extract.
05 - Combine fresh lemon juice and whole milk in a measuring cup.
06 - Add dry ingredients to the butter mixture in three parts, alternating with the lemon-milk mixture, beginning and ending with dry ingredients. Mix just until combined to avoid overmixing.
07 - Pour batter evenly into the prepared bundt pan and smooth the top.
08 - Bake for 40 to 45 minutes, or until a skewer inserted in the center comes out clean.
09 - While baking, stir together granulated sugar and lemon juice in a small bowl until sugar dissolves.
10 - Cool the cake in the pan for 15 minutes, then invert onto a wire rack set over a tray.
11 - Using a skewer, poke holes in the warm cake surface and slowly spoon the lemon drizzle over, allowing it to soak in.
12 - Let the cake cool completely before glazing.
13 - Whisk powdered sugar with 2 to 3 tablespoons lemon juice until smooth and pourable. Drizzle over the cooled cake before serving.