Ingredients
Method
- Preheat the oven to 350°F and lightly grease a 9 x 13-inch baking dish.
- In a medium bowl, whisk together the flour, baking soda, salt, and cinnamon.
- In a large bowl, beat the butter with both sugars until the mixture looks light and fluffy.
- Add the eggs one at a time, then mix in the vanilla.
- Mix in the dry ingredients on low speed just until combined.
- Stir in the oats and chocolate chips, then press the dough evenly into the prepared pan.
- Bake for about 25 minutes, until the edges are golden brown. Let the bars cool before slicing and serving
Notes
Room-temperature butter matters here. The butter should be soft enough to dent with a finger, but not melted, because that helps the sugar cream in properly and gives the bars their soft texture.
Measure the flour carefully by spooning it into the cup and leveling it off. That helps prevent adding too much flour, which can make the bars heavier and drier.
Room-temperature eggs also help the batter mix more evenly. The source suggests placing cold eggs in lukewarm water for a few minutes if you need to warm them quickly.
Fresh baking soda is worth checking before you start. The recipe notes recommend testing it with a little vinegar to make sure it bubbles right away
