Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a medium bowl, whisk together flour, baking soda, and salt. Set aside.
In a large bowl, cream softened butter, brown sugar, and granulated sugar until light and fluffy.
Beat in the egg and vanilla extract until well combined.
Gradually add dry ingredients to the wet mixture. Mix until just combined.
Gently fold in Rice Krispies and mini chocolate chips.
Drop rounded tablespoons of dough onto the baking sheet, spacing about 2 inches apart.
Bake for 10–12 minutes, until edges are lightly golden but centers are soft.
Let cool on the baking sheet for 5 minutes, then transfer to a wire rack.