Step 1: Prepare the Oven and Pan
Preheat your oven to 325°F (163°C). Grease a 9×5-inch loaf pan or a bundt pan with butter or nonstick spray, and lightly dust with flour to prevent sticking.
Step 2: Cream Butter and Sugar
In a large mixing bowl, cream the softened butter and sugar together until light and fluffy, about 3-5 minutes using a hand or stand mixer.
Step 3: Add Eggs and Lemon
Add the eggs one at a time, mixing well after each addition. Then mix in the lemon juice, lemon zest, and vanilla extract if using.
Step 4: Combine Dry Ingredients
In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry mixture to the wet ingredients, alternating with sour cream. Begin and end with the flour mixture. Mix until just combined; do not overmix.
Step 5: Bake the Cake
Pour the batter evenly into your prepared pan. Bake for 60–70 minutes, or until a toothpick inserted into the center comes out clean. Let the cake cool in the pan for 10 minutes before transferring it to a wire rack to cool completely.
Step 6: Glaze the Cake
While the cake is cooling, whisk together the powdered sugar, lemon juice, and lemon zest to create the glaze. Drizzle over the cooled cake for a tart-sweet finish.