US crochet terms.
Using 8ply yarn scraps and 3.5mm hook;

Cake - I used a light tan colour;
Work 6sc in a magic ring.
Rnd 2: 2sc in ea st around, join with a sl st, ch1. (12)
Rnd 3: (2sc in first st, 1sc in next) around, join, ch1. (18)
Rnd 4: (2sc in first st, 1sc in ea of next 2sts) around, join, ch1. (24)
Rnd 5: working in BACK LOOPS ONLY, 1sc in ea st around, join, ch1.
Rnd 6: working through both loops again, sc around, join, ch1.
Rnd 7: (2sc in first st, 1sc in ea of net 4sts) around, join, ch1. (30)
Rnds 8 & 9: sc around, join, ch1.
Rnd 10: (2sc in first st, 1sc in ea of net 5sts) around, join, ch1. (35)
Rnd 11: sc around, join ch1.
Rnd 12: sc around - do not join.
From here work in your icing colour (I used light pink) and in amigrumi style - continuous rounds, no joining.
Rnd 13:working in BACK LOOPS ONLY from here on,
(2sctog, 5sc) around. (30)
Rnd 14: (1hdc in next 4sts, 2hdctog) around. (24)
Rnd 15: 1hdc in ea st around. (24)
Stuff
From here on…work (1hdc in net 3sts, 2hdctog) around until your work comes to a point, continuing to stuff as you need to.
When the hole is closed at the top of your icing, finish off.
You can finish here once the hole is closed if you like or
connect your yarn in the first front loop at the base of your icing and work a row of sc back up the remaining front loops to make the ridges on your icing more pronounced - I worked one round, then skipped a row of loops and went on to the next.

Cherry;
I used a dark red,
6sc in a magic ring.
Rnd 1: (2sc in first st, 1sc in next) around. (9)
Rnds 2 & 3: 1sc in ea st around. (9)
Rnd 4: (2sctog, 1 sc in next) around, finish off - leave a tail to close the hole later - stuff.
Cherry stalk,
using dark green,
Ch 10, sc back down the chain (9sc), finish off.

Cupcake Wrapper;
I used cream,
Using single strand of yarn and 4.5 m hook,
Work 6sc in a magic ring.
Rnd 2: 2sc in ea st around, join with a sl st, ch1. (12)
Rnd 3: (2sc in first st, 1sc in next) around, join, ch1. (18)
Rnd 4: (2sc in first st, 1sc in ea of next 2sts) around, join, ch1. (24)
Rnd 5: working in BACK LOOPS ONLY, 1sc in ea st around, join, ch1.
Rnd 6: working through both loops again, sc around, join, ch2 .
Rnd 7: (2hdc in first st, 1hdc in next) around, ch 3. (36)
Rnds 8-10: (1fpdc, 1bpdc) around. (36)
Rnd 11: Evenly space 9 shells (5dc) around to finish off.