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Easy One Bowl Oatmeal Cookies - Simple No-Mixer Recipe

This simple one-bowl oatmeal cookie recipe requires no special equipment and delivers perfectly chewy cookies every time. Perfect for busy families and beginner bakers, these versatile cookies can be customized with your favorite mix-ins like raisins or chocolate chips.
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Prep Time 15 minutes
Cook Time 12 minutes
Total Time 27 minutes
Calories: 120
Ingredients Method Notes

Ingredients
  

Ingredients
  • 1 cup all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup unsalted butter, softened
  • 1/2 cup brown sugar
  • 1/4 cup granulated sugar
  • 1 large egg
  • 1 teaspoon vanilla extract
  • 1 1/2 cups old-fashioned oats
  • 1/2 cup raisins or chocolate chips (optional)

Method
 

Instructions
  1. In your single mixing bowl, combine the softened butter, brown sugar, and granulated sugar. Use a wooden spoon or spatula to mix until well combined and creamy.
  2. Add the egg and vanilla extract to the butter-sugar mixture. Stir vigorously until the egg is fully incorporated and the mixture is smooth.
  3. Sprinkle the flour, baking soda, and salt directly over the wet ingredients. Gently fold everything together until just combined - be careful not to overmix.
  4. Add the oats and any optional mix-ins like raisins or chocolate chips. Stir until evenly distributed throughout the dough.
  5. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper. Drop rounded tablespoons of dough onto the prepared sheet, spacing them about 2 inches apart.
  6. Bake for 10-12 minutes, or until the edges are golden brown but the centers still look slightly soft. Remove from oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack.

Notes

For the chewiest cookies, make sure your butter is properly softened but not melted. Don't overbake - the cookies will continue to set as they cool on the baking sheet. Cookies store beautifully in an airtight container for up to 5 days, or freeze dough balls for up to 3 months.