Preheat the oven to 350 degrees. Line a 9-inch square baking dish with parchment or foil and lightly spray with cooking spray.

Place the oats on a rimmed baking sheet and bake for 8-10 minutes until lightly toasted.

While the oats are toasting, add the honey, butter, and brown sugar to a small saucepan. Cook over medium heat until the butter melts and the sugar dissolves, stirring occasionally. Let the mixture come to a light bubble for 1 minute while stirring. When butter mixture is ready, remove it from the heat and stir in the vanilla, salt, and peanut butter.

Add the toasted oats and the peanuts to a large bowl. Pour the honey mixture over the oat and nut mixture and stir to combine. Stir to combine. Make sure none of the oats are dry.

Place all of the oat mixture in the prepared pan. Use a rubber spatula or the bottom of a greased measuring cup to press the mixture into the pan.

Let this cool for about 10 minutes before sprinkling the mini chocolate chips over the top. Press the chocolate chips into the granola bars with the bottom of a measuring cup.

Chill the granola bars for at least 2 hours. Lift the bars from the pan using the edges of the foil or parchment and place them on a cutting board. Cut into desired shape and size and serve.