1. Mix butter, corn oil, salt, and sugar to beat.
2. Add whole egg liquid, vanilla extract, yogurt, and lemon juice in portions and mix well.
3. Add the sifted low flour and baking powder and mix well.
4. Into the mold, scrape the flat paste with a spatula, and put marshmallows on the surface. It's best to press down the marshmallow to make it even with the batter.
5. Bake in the oven at 170 to 180 degrees for about 30 minutes,
6. Garnish with powdered sugar after baking.
Tips:I use Yangchen's three-piece brownie set. You can also bake it in a square movable bottom mold. If it is not a non-stick mold, put greased paper.
