⭐ All-Purpose Flour with Cornstarch (Best Vegan Option)
For every 1 cup cake flour, use 1 cup all-purpose flour minus 2 tablespoons, plus 2 tablespoons cornstarchCake flour has a lower protein content (around 7-8%) compared to all-purpose flour (10-12%), which affects gluten formation and texture. Adding cornstarch dilutes the protein in all-purpose flour, mimicking cake flour's softness and fine crumb.
To succeed, sift the all-purpose flour and cornstarch together to ensure even distribution and prevent clumping. Avoid overmixing the batter to minimize gluten development.
Compared to using cake flour, this substitute produces brownies with a slightly firmer texture but still tender and cakey, preserving the characteristic moistness and softness expected in cake flour brownies.