Kue Selai Kacang Coklat untuk Banyak Orang

Bahan-bahan (20 porsi)

• 1 3/4 cups flour (, plain / all purpose)
• 3/4 cup cocoa powder (, unsweetened (Note 1))
• 1 1/2 tsp baking powder
• 1 1/2 tsp baking soda ((bi-carb soda) (Note 2))
• 2 cups white sugar (or caster/superfine sugar)
• 1 tsp cooking / kosher salt ((yes, really!))
• 2 large eggs
• 1 cup milk ((low or full fat))
• 1/2 cup vegetable oil (, or other plain flavoured oil like canola, grapeseed, rapeseed, sunflower)
• 2 tsp vanilla extract
• 2 tsp instant coffee powder (, OPTIONAL (Note 3))
• 1 cup boiling water ((makes the chocolate flavour "bloom"))
• 250 g / 2 sticks unsalted butter (, softened)
• 4 cups (500 g) soft icing sugar / powdered sugar (, sifted (Note 4))
• 1/2 cup (120 g) smooth peanut butter ((spread, not pure) (Note 5))
• 1/4 tsp cooking/kosher salt
• 1 tbsp milk
• 1/2 cup chocolate chips or melts ((US: semi sweet chips))
• 2 tbsp cream ((thickened/heavy or pure, not low fat))
• 3 tbsp peanut butter (, warmed in microwave to make it runny)
• 120 g / 4 oz mini Reece's Peanut Butter Cups
• 10 + miniature Reece's Peanut Butter Cups (, halved)
• 1/4 cup salted peanuts (, finely chopped)