Start by selecting the perfect apples for your crisp. I love combining tart and sweet varieties for depth of flavor. Peel, core, and slice your apples into thin wedges. Aim for about six cups of sliced apples. In a large mixing bowl, toss the apple slices with 1/3 cup granulated sugar and 1 teaspoon of ground cinnamon. Let this sit for a moment while you prepare the topping.

In a separate bowl, combine 1 cup of flour, 1/2 cup of packed brown sugar, 1 teaspoon of baking powder, and 1/2 teaspoon of salt. Make sure these dry ingredients are mixed well. Next, add the unbeaten egg, 1/2 teaspoon of cinnamon, and 1/3 cup of melted butter to the dry mix. Add in 1 teaspoon of vanilla extract for that extra burst of flavor. Mix everything together until it resembles a crumbly texture.

Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking dish with a little butter or cooking spray to prevent sticking. Spread the apple mixture evenly across the bottom of the dish. Then, sprinkle the topping mixture generously over the apple filling, ensuring it's evenly distributed for uniform cooking.

Pop your assembled apple crisp into the preheated oven and let it bake for about 30-40 minutes, or until the topping is golden brown and the apples are bubbling. You’ll want to keep an eye on it in those last few minutes of cooking. The tantalizing smell of cinnamon and baking apples will surely fill your kitchen.

After baking, remove the dish from the oven and let it cool for about ten minutes. This will not only make it easier to serve but also lets the flavors meld beautifully. Serve warm, with a scoop of ice cream melting on top for a treat that will have everyone coming back for seconds.