How to make buttercream filling<br>Place the butter in a mixing bowl and beat it until it is smooth and fluffy. Use a handheld mixer or a food processor with a whisk attachment. It will make things much easier.
a whisk attachment can name butter smooth and fluffy
( z1 possible :ARG1 ( z2 name :ARG0 ( z3 attachment :mod ( z4 whisk ) ) :ARG1 ( z5 butter :ARG1-of ( z6 smooth ) :mod ( z7 fluffy ) ) ) )