Chocolate Peanut Butter Cake

Ingredients

• 1 and 3/4 cups all-purpose flour (spooned & leveled)
• 3/4 cup unsweetened natural cocoa powder
• 1 and 3/4 cups granulated sugar
• 2 teaspoons baking soda
• 1 teaspoon baking powder
• 1 teaspoon salt
• 2 teaspoons espresso powder (optional)
• 1/2 cup canola or vegetable oil
• 2 large eggs (at room temperature)
• 3/4 cup full-fat sour cream (at room temperature)
• 1/2 cup buttermilk (at room temperature)
• 2 teaspoons pure vanilla extract
• 1/2 cup hot water or black coffee
• 1 cup mini semi-sweet chocolate chips (tossed in 1 Tablespoon flour)
• 3/4 cup unsalted butter (softened to room temperature)
• 1 and 3/4 cups creamy peanut butter
• 1 and 3/4 cups confectioners' sugar
• 1 teaspoon pure vanilla extract
• pinch of salt
• 3 Tablespoons heavy cream or heavy whipping cream (at room temperature)
• 8 ounces quality semi-sweet chocolate (finely chopped)
• 1 cup heavy cream or heavy whipping cream
• optional garnish: chopped or mini peanut butter cups