To make chewy cookies instead of crunchy, follow these tips: use a chewy cookie recipe, slightly underbake them until the edges are golden, opt for brown sugar or add an extra egg yolk for moisture, consider melted butter, chill the dough, use cake or pastry flour, avoid overmixing,. Additionally, making larger cookies tends to result in a chewier texture, and proper storage in an airtight container helps maintain softness.