1/2cupoil Canola , vegetable, or other light oil preferred
1 1/2 cupssugar Granulated or caster sugar
4eggs, medium to largeRoom temperature
2-3tspvanilla extract
1 1/2cupsall-purpose flour
1 1/2cupscake flour Cake flour substitute: measure one cup flour (120g), remove 2 tablespoons flour and add 2 tablespoons of corn starch or corn flour
1tbspbaking powder
1tspsalt
1 1/4 cupsbuttermilk, room temperature May substitute with 1 Tbsp vinegar or lemon juice per cup of whole milk, but real buttermilk is best here
1cupOreo cookies, chopped
Cookies & Cream Buttercream Frosting
1cupbutter, room temperatureMay use salted or unsalted
4cupspowdered sugarMight need more or less
3tbspcream or milkDepending on consistency
1-2tspVanillaTo taste
Pinch of saltMay skip if you use salted butter
1cupchopped Oreo cookiesDon't chop too finely
Instructions
Preheat oven to 350F / 177C / gas mark 4. Lightly grease two 8" cake pans with Baker's Joy or grease and flour. If using baking strips, place them in a bowl of water to soak.
In a medium bowl, combine flours, baking powder, and salt. Set aside.
In a large bowl or stand mixer, cream together the butter, oil, and sugar. Add eggs, beating after each addition. Beat in vanilla until combined.
With the mixer on low, or by hand, gently alternate adding the flour mixture and the buttermilk, adding a third of each at a time, beginning and ending with the flour. Be sure to scrape the bottom and sides of the bowl, and avoid over-mixing.
Gently stir in chopped Oreo cookies by hand. Do not over mix or the cake will take on a gray shade.
Pour the batter evenly into the prepared baking pans. Remove the baking strips from the water and squeeze as much water out as you can. Secure a strip around each pan.
Bake for 30-35 minutes, or until the tops are golden and a toothpick or skewer inserted near the center comes out clean with no wet batter. (Some moist crumbs are to be expected.)
Allow to cool in the pans for up to 20 minutes. Then invert onto wire racks to cool completely.
Cookies and Cream Buttercream
In a stand mixer with the whisk attachment (or a large bowl with hand held mixer), beat butter until smooth and creamy, about 2-3 minutes. Add the powdered sugar, 3 tbsp cream, vanilla, and salt if using. Beat slowly at a low speed until the powdered sugar is incorporated. Increase to medium speed and beat for 2-3 minutes. Test the texture: if it's too stiff, add more cream or milk. If too loose, add more powdered sugar.
Stir in chopped Oreos to make Cookies & Cream Buttercream frosting. (Be careful not to stir too vigorously or the cookies will break up too much and the frosting will have a gray tint.)
When cakes are completely cooled, frost with Cookies and Cream Buttercream frosting in the middle, top, and sides, and decorate the top with extra cookies.
Keyword buttercream, cake, cookies and cream, dessert, oreos, vanilla