Heat oven to 375. Line 2 baking sheets with parchment paper.

Whisk flour, salt, and baking soda together in medium bowl; set aside.

Melt butter in a small pot or skillet over medium-high heat, swirl pan occasionally, until foaming subsides. Stir and scrape bottom of pan with heat-resistant spatula, until milk solids are dark golden brown and butter has nutty aroma, around 1 to 2 minutes.

Transfer browned butter to large heatproof bowl and stir in cinnamon. Add brown sugar, granulated sugar, and oil to browned butter and whisk until combined.

Add discard, eggs and vanilla and whisk until mixture is smooth. Using wooden spoon or spatula, stir in flour mixture until fully combined, about 1 minute.

Add oats, and mix-ins (if using) and stir until evenly distributed (your mixture will be thick and stiff)

Use 1 1/2 tablespoon cookie scoop and arrange 2 inches apart.

Bake 8 to 10 minutes.

Nutrition Facts Servings: 40 Amount per serving Calories 75 % Daily Value* Total Fat 4.6g 6% Saturated Fat 1.5g 8% Cholesterol 12mg 4% Sodium 111mg 5% Total Carbohydrate 7.4g 3% Dietary Fiber 0.4g 2% Total Sugars 4.6g Protein 1.4g Vitamin D 2mcg 8% Calcium 11mg 1% Iron 0mg 2% Potassium 35mg 1% *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calorie a day is used for general nutrition advice. By very well fit.com