Preheat oven to 350º F. Grease 1-9 inch round baking pan or add parchment paper to the bottom and grease sides of pans and dust with flour.
Sift together flour, baking powder, baking soda and salt. Set aside.
Using a stand or hand mixer, beat butter until smooth and then gradually sugar and beat for 2-3 minutes until it is fluffy and turning pale. Add egg, and beat until combined.
Measure milk, vanilla and vegetable into the measuring cup.
On low speed, add flour mixture to butter mixture, alternating with milk mixture. Start with flour and end with flour, mix until smooth and all of the ingredients are combined. But don’t overmix.
Pour batter into the baking pan, making sure it’s leveled. Bake for 25 minutes. Check with cake tester or toothpick for doneness. Then transfer to cooling rack. Allow to cool in pan until no longer warm, then remove from pan and peel off the parchment paper and place on serving plate.
Garnish with whipping cream and strawberries or other berries.