01 - Preheat oven to 350°F. Thoroughly grease and flour an 8-inch round cake pan, ensuring complete coverage to prevent sticking.
02 - Whisk together flour, baking powder, and salt in a medium bowl until uniformly blended. Set aside for later use.
03 - Beat softened butter and granulated sugar in a large bowl until light and fluffy, approximately 3-4 minutes. Add eggs one at a time, mixing thoroughly after each addition. Incorporate chopped lavender and vanilla extract.
04 - Alternate adding flour mixture and milk to butter mixture, beginning and ending with dry ingredients. Mix gently until just combined, taking care not to overmix.
05 - Pour batter into prepared pan and smooth surface evenly. Bake for 25-30 minutes until a toothpick inserted in center emerges clean.
06 - While cake bakes, combine water, sugar, and lavender in small saucepan. Simmer for 3 minutes, then strain and set aside to cool slightly.
07 - Allow cake to cool in pan for 10 minutes. Using skewer, poke small holes across surface and gently brush with warm lavender syrup. Cool completely before glazing.
08 - Whisk powdered sugar, lemon juice, and finely chopped lavender until smooth consistency. Drizzle evenly over completely cooled cake and allow glaze to set before serving.