📖 Instructions

1. Before you even think about mixing, take your butter out. You'll need it softened to room temperature, which usually takes about 30-60 minutes depending on your kitchen's warmth. This is crucial for that creamy, smooth cookie dough we're aiming for. While that's happening, preheat your oven to 350°F (175°C). Line two large baking sheets with parchment paper or silicone baking mats. This step will make cleanup a breeze and prevent sticking.
2. In a large mixing bowl, using an electric mixer (or a strong arm and a whisk!), beat together the softened unsalted butter and both the granulated sugar and light brown sugar. You want to cream these together until the mixture is light and fluffy, about 2-3 minutes. Don't rush this part! This aeration is what helps give your cookies that amazing chewiness.
3. Now, crack in the large egg and add the vanilla extract. Beat on medium speed until everything is well combined and smooth. Make sure there are no streaks of egg visible. This might take another minute or so, really scrape down the sides of the bowl to ensure everything is incorporated.
4. In a separate medium bowl, whisk together your dry ingredients: the all-purpose flour, old-fashioned rolled oats, ground cinnamon, baking soda, and a pinch of salt. The salt really brings out all the other flavors, don't skip it! Make sure to break up any clumps in the flour or spices.
5. Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Be careful not to overmix! Overmixing develops too much gluten, which can lead to tough cookies. As soon as you see no more dry flour, stop the mixer. It's okay if it still looks a little shaggy.
6. Finally, gently fold in the raisins by hand. You can use a spatula for this. Make sure they are evenly distributed throughout the dough. Some folks like to plump their raisins in warm water for a few minutes before adding, but I usually find them perfect right from the bag.
7. Drop rounded tablespoons of cookie dough onto your prepared baking sheets, leaving about 2 inches between each cookie. They will spread! I usually get about 12 cookies per sheet. If you want consistently sized cookies, use a cookie scoop – it’s a total game-changer, trust me.
8. Bake for 10-12 minutes, or until the edges are golden brown and the centers are just set but still look slightly soft. Remember, every oven is a little different, so keep an eye on them! You might even want to rotate your baking sheets halfway through for even baking.
9. Once baked, let the cookies cool on the baking sheets for about 5 minutes before transferring them to a wire rack to cool completely. This cooling time on the hot sheet helps them firm up and develop that desirable chewy texture without becoming too hard. Resisting the urge to eat them all immediately is the hardest part, I know!