01 -
Grease a 13x9 inch pan with cooking spray and line with parchment paper. In a stand mixer fitted with paddle attachment, beat butter, granulated sugar, brown sugar, and vanilla on high speed until smooth and creamy, about 4 minutes.
02 -
Gently crush oats to break into smaller pieces. Slowly add oats, flour, cinnamon, and salt, beating on medium-low speed until blended, 1-2 minutes.
03 -
Press base mixture into bottom of prepared pan. Cover and refrigerate at least 20 minutes or up to 1 day.
04 -
Preheat oven to 350°F. Bake base until beginning to firm up, about 10 minutes.
05 -
In a large bowl, whisk eggs, honey, granulated sugar, brown sugar, and vanilla until well combined.
06 -
Add pumpkin puree, cream, pumpkin pie spice, nutmeg, and salt. Stir with wooden spoon until combined.
07 -
Clean stand mixer bowl and paddle. Beat brown sugar and butter on medium speed until combined. Break down oats with fingers while adding for varied texture. Add flour and salt, beating on low speed until just combined.
08 -
Pour pumpkin filling over base in pan. Cover with foil and cut a large slit lengthwise down center. Bake until filling starts to set, about 50 minutes.
09 -
Remove foil and crumble oat topping over surface, leaving some filling exposed. Continue baking until topping crisps up, about 15 minutes more.
10 -
Let cool at least 30 minutes, or ideally refrigerate up to 1 day before cutting into bars.