MY GO-TO YELLOW CAKE + MARSHMALLOW BUTTERCREAM FROSTING

Ingredients

• 1 cup unsalted butter, room temp
• 2 cups granulated sugar
• 4 eggs, room temp
• 2 3/4 cups bread flour (I just always bake with bread flour, but you can use all purpose!)
• 2 1/4 tsp baking powder
• 1/2 tsp salt
• 1 cup buttermilk (to make your own, mix 1 cup of milk + 1 tbsp white vinegar and let it sit for 5 min)
• 2 tbsp good vanilla extract
• Milk soak: 1/4 cup milk + 1 tsp vanilla
• 1 cup salted butter, room temp (or add 1/4 tsp salt to unsalted butter)
• 14 ounces Marshmallow Fluff
• 2 cups powdered sugar
• 1 teaspoon vanilla