01 -
Preheat oven to 175°C (350°F). Spray two 20cm (8-inch) pans with non-stick baking spray. Dust both pans with flour and tap out any excess to prevent sticking.
02 -
In a large bowl, sift together pumpkin pie spice, cinnamon, cloves, ginger, baking soda, baking powder, and flour. Whisk until thoroughly combined.
03 -
In a separate mixing bowl, add butter, oil, brown sugar, and granulated sugar. Mix on medium speed until light and fluffy, then scrape down the sides of the bowl.
04 -
Add vanilla and eggs one at a time, beating until completely incorporated. Scrape down the sides of the bowl after each addition.
05 -
Add pumpkin puree and mix until fully incorporated.
06 -
Add dry ingredients to the wet mixture and mix on low just until flour is incorporated. Do not overmix.
07 -
Divide batter equally between the two prepared pans. Bake for 30-35 minutes or until a toothpick inserted into the center comes out clean or with a few moist crumbs.
08 -
Allow cakes to cool in pans for 10 minutes, then turn out onto cooling racks to cool completely.
09 -
For frosting, melt butter in a saucepan over medium-high heat until it reaches a deep amber color and develops a nutty aroma, approximately 10 minutes.
10 -
Immediately pour browned butter (including dark bits for enhanced flavor) into a heat-safe container. Cool in refrigerator for 15-20 minutes.
11 -
Add vanilla, powdered sugar, and milk to cooled brown butter. Mix on low until powdered sugar is mostly incorporated, then whip on high speed for 1 minute until fluffy.
12 -
Frost the completely cooled cake layers, slice, and serve.