01 - Preheat oven to 350°F and line a 12-cup muffin tin with paper liners.
02 - In a large bowl, cream together butter and sugar until light and fluffy.
03 - Beat in eggs one at a time, then mix in vanilla extract.
04 - Whisk together flour, baking powder, and salt in a separate bowl.
05 - Add dry ingredients to wet mixture in three additions, alternating with milk, mixing until just combined.
06 - Divide batter evenly among cupcake liners, filling each about 2/3 full.
07 - Bake for 18-20 minutes until a toothpick inserted into the center comes out clean.
08 - Let cool in pan for 5 minutes, then transfer to wire rack to cool completely.
09 - Beat butter until creamy. Gradually add powdered sugar, then milk, vanilla, and salt. Beat until light and fluffy.
10 - Frost completely cooled cupcakes with buttercream using a piping bag or spatula.
11 - Decorate generously with edible wildflowers just before serving.