01 -
Preheat oven to 350°F (175°C) and grease an 8x8-inch baking pan.
02 -
Melt the butter in a microwave-safe bowl. Stir in sugar, eggs, and vanilla extract until smooth.
03 -
Add cocoa powder, flour, baking powder, and salt. Mix until fully combined.
04 -
Pour the brownie batter into the prepared pan and spread evenly.
05 -
Bake for 20-25 minutes or until a toothpick inserted into the center comes out with moist crumbs. Let the brownies cool completely.
06 -
In a small bowl, melt white chocolate chips with vegetable oil in the microwave, stirring every 15 seconds until smooth.
07 -
Pour the melted white chocolate into a piping bag (or a small plastic bag with a tiny cut at the corner).
08 -
Starting from the center of the brownies, pipe a spiral pattern. Then, use a toothpick to drag lines from the center outwards to create the spiderweb design.
09 -
Let the topping set before cutting the brownies into squares.