01 - Preheat oven to 350°F. Grease and flour an 8-inch round cake pan thoroughly.
02 - Whisk together flour, baking powder, and salt in a medium bowl. Set aside.
03 - Beat softened butter and granulated sugar in a large bowl until light and fluffy, approximately 3 minutes. Add eggs one at a time, mixing well after each addition. Blend in chopped lavender and vanilla extract.
04 - Alternately add flour mixture and milk to butter mixture, beginning and ending with flour. Mix until just combined, being careful not to overmix.
05 - Pour batter into prepared pan and smooth top evenly. Bake for 25-30 minutes or until toothpick inserted in center emerges clean.
06 - While cake bakes, combine water, sugar, and lavender buds in small saucepan. Simmer for 3 minutes. Strain through fine mesh sieve and set aside.
07 - Let cake cool in pan for 10 minutes. Poke small holes across surface with skewer and brush with warm lavender syrup if desired. Cool completely in pan.
08 - Whisk powdered sugar, lemon juice, and chopped lavender until smooth and pourable consistency is achieved.
09 - Drizzle glaze evenly over cooled cake. Allow glaze to set for 15 minutes before slicing and serving.