01 - Preheat oven to 350°F. Grease and line two 8-inch round cake pans with parchment paper.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until well combined.
03 - In a large bowl, beat butter and sugar together until light and fluffy. Add eggs one at a time, beating well after each addition. Mix in vanilla extract.
04 - Add flour mixture in three parts, alternating with buttermilk, beginning and ending with flour. Mix until just combined, being careful not to overmix.
05 - Divide batter evenly between prepared pans. Smooth the tops. Bake for 25 to 30 minutes, or until a toothpick inserted in the center comes out clean.
06 - Let cakes cool in the pans for 10 minutes, then turn out onto wire racks to cool completely before assembling.
07 - While cakes are cooling, combine sliced strawberries and ¼ cup granulated sugar in a bowl. Let sit for 20 minutes to release juices.
08 - Whip heavy cream with powdered sugar and vanilla extract until stiff peaks form. Be careful not to overwhip.
09 - Place one cake layer on a serving plate. Spread half the whipped cream over the cake and top with half the strawberries, including their juices.
10 - Place the second cake layer on top. Spread remaining whipped cream over the top and decorate with the remaining strawberries. Chill for at least 30 minutes before serving for best texture.