01 - Preheat oven to 350°F. Grease and flour two 8-inch round cake pans, lining bottoms with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until well blended.
03 - In a large bowl, beat butter and sugar until light and fluffy, approximately 3–4 minutes.
04 - Add eggs one at a time, beating thoroughly after each. Mix in lemon zest and vanilla extract.
05 - Combine lemon juice, milk, and sour cream in a separate bowl or measuring cup.
06 - With mixer on low, alternately add flour mixture and lemon-milk mixture to butter mixture, beginning and ending with flour. Mix until just incorporated.
07 - Gently fold chopped strawberries into batter. Add food coloring if desired for pink tint.
08 - Divide batter evenly between prepared pans, smoothing tops with spatula.
09 - Bake for 28–32 minutes, or until toothpick inserted into center emerges clean.
10 - Let cakes cool in pans for 10 minutes, then invert onto wire racks to cool completely.
11 - Beat butter until creamy. Blend in powdered sugar, lemon zest, lemon juice, salt, and 2 tbsp cream. Whip until fluffy, 3–5 minutes, adding more cream if needed for consistency.
12 - Level cooled cake tops if necessary. Spread buttercream layer between cakes, then frost top and sides.
13 - Garnish with fresh strawberry halves and lemon slices or zest curls.