Preheat your oven to 350°F (176°C)

For the topping, mix melted butter with sugar and spread evenly across the bottom of a 9×2 inch cake pan

Arrange strawberry slices over the sugar mixture, starting from the outer edge and working toward the center

In a medium bowl, whisk together flour, baking powder, and salt

In a separate large bowl, beat butter, oil, sugar, and vanilla until light and fluffy (about 2-3 minutes)

Add eggs one at a time, mixing well after each addition

Add half the flour mixture to the wet ingredients and mix until just combined

Pour in the milk and stir gently

Fold in the remaining flour mixture until fully incorporated (avoid overmixing)

Carefully spread the batter over the arranged strawberries

Bake for 45-50 minutes until a toothpick inserted in the center comes out clean

Immediately after removing from oven, place a kitchen towel over the cake and gently press down to flatten any dome

Allow cake to cool in the pan for 30 minutes

Run a knife around the edges and invert onto a serving plate

Serve warm with whipped cream if desired