Preheat oven to 375° and line two baking sheets with parchment paper.
In a small bowl, sift together all-purpose flour, baking soda, and salt. Set aside.
In a stand mixer (or a large bowl with a hand mixer) beat together butter, peanut butter, vanilla, and both sugars until light and fluffy. Add eggs, one at a time, scraping down the sides of the bowl with a spatula between each well incorporated egg.
Add the flour mixture one large spoonful at a time and mix until just combined. A bit of stray flour is fine, because you’ll be mixing in more stuff.
Using a stiff wooden spoon or rice paddle (my personal favorite mixing tool), gently stir in your chocolate chips and 1 ½ cups of the Rice Krispies.
Using a 2 tablespoon cookie scoop, scoop up balls of cookie dough. Dip each ball into the remaining ½ cup of Rice Krispies cereal to get some rice on the top for prettiness and texture. Place balls of dough on the parchment lined baking sheet, leaving a couple of inches between each ball to leave room for spreading.
Bake for 10-12 minutes, or until the cookies are golden brown on the edges and beginning to set. Sprinkle with flaky sea salt, if desired. I almost always do 😉
Let cookies cool on the pan for 5 minutes and then move them from the pan to a cooling rack and allow to fully cool before gobbling them up.