01 - Preheat oven to 350°F. Grease a 9x5-inch loaf pan and line with parchment paper.
02 - In a large bowl, whisk together flour, baking powder, baking soda, and salt until well blended.
03 - In a separate bowl, combine Greek yogurt, granulated sugar, eggs, oil, lemon zest, lemon juice, and vanilla. Whisk until smooth and fully incorporated.
04 - Pour wet ingredients into dry ingredients. Gently fold together with a spatula just until combined—do not overmix or the cake will become tough.
05 - Transfer batter to the prepared loaf pan. Use a spatula to smooth the top evenly.
06 - Bake for 45-55 minutes until a toothpick inserted into the center comes out clean or with just a few moist crumbs.
07 - Let the loaf cool in the pan for 10 minutes. Remove from pan and transfer to a wire rack to cool completely.
08 - Whisk powdered sugar with lemon juice, adding juice gradually until reaching a thick but pourable consistency.
09 - Drizzle the glaze over the completely cooled loaf. Slice into 10 pieces and serve.