Step 1

Preheat the oven to 350 F and spray a half sheet pan with nonstick baking spray.

Step 2

In a large bowl, using a whisk, mix together the butter and syrup, flexing your muscles for about 2 minutes, until the mixture is light, fluffy and fully combined. Whisk in the eggs, stirring to aerate and combine them, about 1 minute. Whisk in the oil, vanilla and vinegar, and mix vigorously for another 2 minutes, to yield a looser, smoother mixture.

Step 3

Measure the flour, baking powder and salt into the mixing bowl, and with the whisk toss together only the dry ingredients on top first, before truly stirring them into the wet ingredients below. Mix until everything is just combined.

Step 4

Spread the batter evenly across the prepared baking pan, and bake for 25 to 30 minutes, until it's golden brown and a toothpick comes out clean when inserted into the center.