Measure 2 cups of oats, then blend in a high-powered blender until they resemble a fine flour. Add to a medium bowl.
Add ¼ cup melted coconut oil, maple syrup, vanilla, and salt to the oats. Stir to combine, then gently fold in 3 tablespoons of sprinkles.
Line a sheet pan with parchment paper. Press the mixture into a flat, even ¼-inch layer.
In a microwave-safe bowl, combine white chocolate chips and the remaining 1 teaspoon of coconut oil. Microwave in 20-second intervals, stirring between each, until melted and smooth.
Pour melted chocolate over the dough and spread it evenly with the back of a spoon or spatula. Sprinkle the remaining 1 tablespoon of sprinkles on top.
Place the pan in the freezer for at least 30 minutes, or until firm. Let it sit at room temperature for a minute before slicing. For clean cuts, use a sharp knife warmed under hot water and dried between cuts.
