Preheat oven to 350F

Line a baking sheet with parchment paper.

In mixer, cream butter, oil, sugars to combine.

Add egg and vanilla, mixing.

Add in the flour, cornstarch, baking powder, and salt until a dough has formed.

Divide into 10 equal pieces and roll into balls. (2.5 ounces each)

Place on parchment and press down with the bottom of a measuring cup.

Bake 10-13 mins until bottoms get slightly golden.

When I removed them I pressed down on the centers again with the measuring cup to create room for the caramel.

Let cool.

Melt cream and caramels gently in microwave. let cool and chill in fridge a few mins to thicken.

Spread into the centers and let set a few mins.

Melt the milk chocolate in the microwave and use an offset spatula to spread on top of the caramel.

Sprinkle with coarse sea salt, if desired and a mini twix bar,

Can serve room temp or chilled.