In a large mixing bowl, add yellow cake mix, cinnamon and nutmeg. Mix well. Add melted butter and mix well. Set aside.: The bowl will smell warmly spiced as you combine the dry cake mix with the cinnamon and nutmeg , a scent that hints at the finished dessert. As you pour in the melted butter , you should see the dry mix take on a slightly clumpy, sandy texture, almost like coarse breadcrumbs, which is exactly what you want for a topping that will crisp. Stirring brings out the rich butter aroma and distributes fat so the topping browns evenly during cooking. Run your fingers through the mixture to check for uniformity, and if you find dry pockets, fold gently until moistened. A common mistake is adding cool butter that re-solidifies, leaving greasy lumps, so make sure the butter is fully melted and warm when added. This step matters because the texture of the final topping depends on consistent coating of the dry mix with fat, which creates those golden toasted bits and keeps the interior tender.
Grease a 6 quart slow cooker with nonstick cooking spray. Spread apple pie filling into the bottom of the slow cooker. Sprinkle crumbled cake mix on top. Top with pecans.: The first thing you will notice is the glossy surface of the apple pie filling as you spread it into the greased slow cooker, releasing a sweet apple perfume. Use a spatula to smooth the filling into an even layer so every scoop later has fruit. When you sprinkle the prepared cake mix across the top, aim for even coverage to promote a uniformly crisp top; the crumbs will steam a little where they touch the filling and toast where they remain dry, creating textural contrast. Scatter the chopped pecans evenly so each portion gets crunchy bits. If you pile the topping in one spot, it can remain doughy underneath, so distribute gently. Avoid stirring the layers together, because preserving separation yields the best contrast between saucy apples and crumbly topping. The oils from the pecans will bloom during cooking, adding a nutty aroma to the surface.
Place two layers of paper towel on top of the slow cooker and cover with the lid. Heat on high for 3 hours. Serve warm with vanilla ice cream.: As you cover the slow cooker, the steam will begin to circulate and condense on the lid, then drip back into the filling, keeping the apples luscious and saucy. The paper towels act to catch excess condensation so it does not drip back too heavily on the topping, which helps maintain those golden pockets instead of turning them soggy. Set the cooker to high and listen for that low, steady hum as the interior comes to a simmer after some time, and a warm aroma of cooked apples, cinnamon , and butter will fill the room. After about an hour you may notice the edges bubbling gently, and by two to three hours the topping should show toasted hints where exposed. A typical error is removing the lid too often to check, releasing heat and lengthening cook time, so trust the process and resist frequent peeks. This duration is important because it allows the apples to soften fully while letting the topping set and toast without burning.
Serve warm with vanilla ice cream.: When you lift the lid, steam will billow out and you will be greeted by a heady, sweet aroma that signals readiness, and the topping will show flecks of toasted brown and the filling will bubble slightly around the edges. Spoon portions into bowls, making sure each serving has both saucy apples and bits of the crisp topping, then crown with a scoop of cold vanilla ice cream . The contrast of warm and cold creates a creamy sauce as the ice cream melts, heightening texture and flavor. If the topping is not as crisp as you like, a brief blast under a broiler in an oven safe dish can help, but be cautious to avoid melting the ice cream. A common mistake is serving straight from the cooker and not portioning so every bowl has topping and filling balance, so scooping strategically ensures the best eating experience. The result should be a warm, tender apple base with buttery, slightly crunchy topping and a creamy, cool finish from the ice cream.