Preheat your oven: Set the oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper, leaving some overhang for easy removal later.
Melt the wet ingredients: In a small saucepan, melt the coconut oil over low heat. Stir in the maple syrup, brown sugar, vanilla extract, and salt. Continue to stir until the sugar is dissolved, and everything comes to a bubble, around 3-4 minutes. Remove from heat.
Mix the dry ingredients: In a large bowl, combine the sourdough discard, rolled oats, and crisp rice cereal.
Combine wet and dry ingredients: Pour the melted wet mixture over the dry ingredients and stir until evenly combined.
Add the chocolate chips: Gently fold in the mini chocolate chips.
Press into the pan: Pour the granola mixture into the prepared pan and press it down firmly to create an even layer.
Bake: Place the pan in the preheated oven and bake for 12-15 minutes, or until the edges are golden brown.
Cool and cut: Allow the granola bars to cool completely in the pan before cutting into squares or bars.
Store: Store in an airtight container at room temperature for up to 1 week.