Melt vegan butter in a saucepan over medium heat. Stir until golden brown and nutty, then cool slightly.
In a bowl, whisk flour, baking soda, and sea salt.
In another bowl, mix browned butter, brown sugar, and cane sugar until creamy.
Add applesauce and vanilla extract, blending until smooth.
Slowly fold in dry ingredients until just combined.
Stir in chocolate chips evenly.
Scoop dough onto baking sheet lined with parchment paper.
Sprinkle tops with flaky sea salt.
Bake 10–12 minutes until edges are golden brown.
Cool cookies on rack, then serve immediately.