Preheat oven to 350°F. Line a baking sheet with parchment paper.
Spread the oats and nuts in an even layer on the baking sheet, then bake for 4 minutes. Stir and bake for another 4 minutes until toasted. Remove from oven.
2 1/2 cups old-fashioned oats, 1/2 cup coarsely chopped nuts
In a medium saucepan, combine the honey, butter, brown sugar, and salt over medium heat, stirring constantly, just until smooth. Do not let it come to a simmer or boil. Immediately remove from the heat and stir in the vanilla extract.
1/3 cup honey, 4 Tablespoons unsalted butter, 1/4 cup brown sugar, 1/4 teaspoon kosher salt, 1 teaspoon vanilla extract
In a large bowl, combine the toasted oats and nuts with the honey mixture. Stir in any other mix-ins that won't melt like coconut or dried fruit. Let cool for 15 minutes before adding any chocolate chips or mini M&M's.
miniature chocolate chips, toasted coconut flakes, dried cranberries, miniature M&M's, chopped Oreos, white chocolate chips, dried blueberries, dried apples, dried apricots, caramel bits, Rice Krispies, dried pineapple, dried mango, seeds
Line a square pan with parchment paper or foil, then press the granola mixture firmly into the pan by placing a piece of parchment paper on top and pressing down or using a rubber spatula.
Sprinkle extra miniature chocolate chips or other mix-ins on top, if desired, and press them in.
Cover and refrigerate for at least 1-2 hours, then let the bars sit on the counter for 10 minutes before cutting into 12 rectangles using a sharp knife.
Store in an airtight container in the fridge or on the counter for up to 1 week or freeze for up to 2 months.