Line an 8x8-inch baking pan with parchment paper. Set aside.
In a skillet set over medium-high heat, melt the salted butter.
2½ tablespoons salted butter
Add in the almond butter, agave nectar, and salt. Heat the mixture for 5 minutes (or until 225-235°F), stirring continuously over medium-high heat.
½ cup almond butter, ⅔ cup agave nectar, 1 teaspoon kosher salt
Take the pan off the heat and stir in the lemon juice and vanilla extract.
1 tablespoon lemon juice, 1 teaspoon pure vanilla extract
Place the cereal in a large bowl and pour the syrup mixture over the cereal. If adding mini chocolate chips, let the mixture cool for 10 minutes before adding in the mini chocolate chips (optional) and stir until well combined.
4 cups Honey Nut Cheerios cereal, ¼ cup mini chocolate chips
Pour and press the cereal into the parchment-lined pan. Place in the refrigerator for 45 minutes to let cool before serving.