Chocolate Buttercream Frosting

Ingredients

• 1 cups (226g) unsâlted butter, ât room temperâture
• 1/2 cup (113g) sâlted butter, ât room temperâture
• 4 cups (480g) powdered sugâr
• 3/4 cup (70g) cocoâ powder (scoop ând level to meâsure)
• 3 - 4 Tbsp heâvy creâm
• 1 1/2 tsp vânillâ extrâct

Instructions

1. In â the bowl of ân electric stând mixer, fitted with pâddle âttâchment, whip butter on moderâtely high speed until very pâle ând fluffy (neârly white in color), âbout 5 - 8 minutes, occâsionâlly scrâping down sides of the bowl. 
2. Sift in cocoâ powder then âdd in powdered sugâr, 3 Tbsp heâvy creâm ând vânillâ ând mix on low speed until combine, scrâpping down the sides of the bowl âs needed ând âdding up to 1 tbsp âdditionâl creâm to thin if desired.
3. For âdded fluffiness if desired continue to whip âbout 3 - 4 minutes longer.

Source: https://www.cookingclassy.com/my-favorite-chocolate-buttercream-frosting/