Preheat oven to 350F and line a 9x5-inch loaf pan with parchment paper. Set aside.
Pour sugar into a large bowl and top with lemon zest. Use your fingers to work the lemon zest into sugar to release the oils from the zest.
Whisk lemon juice, vegetable oil, eggs, sour cream, milk, and vanilla extract into sugar mixture until smooth.
In a separate medium bowl, combine flour, baking soda, baking powder, salt, and poppy seeds. Fold flour mixture into liquid mixture until batter is just combined.
Scrape batter into prepared pan and smooth top. Bake bread at 350F 35-40 minutes until a toothpick inserted in center of bread comes out clean. Allow bread to cool completely on a wire cooling rack.
Lemon Glaze
In a small bowl, whisk powdered sugar, lemon zest, and just enough milk to achieve a drizzling consistency. Drizzle glaze over cooled bread and allow to set 10 minutes before slicing and serving. Enjoy!
Notes
Storing InstructionsStore bread in an airtight container at room temperature up to 4 days.