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Lace & Fill · Family 12

Swiss Dot Trail with Wilton 12

Graduated beads that shrink by a millimetre at a time - the cheapest way to make a plain cake look designed.

A Swiss dot trail is a line of round beads that gradually changes size, from 5 mm at the bottom to 2 mm at the top, spaced 8 mm apart. It is the most forgiving decoration on the site - a bead that comes out the wrong size can be wiped off with a fingertip and re-piped - and it takes about ninety seconds per trail. Three trails on a cake side is a complete design.

Tip
Wilton 12
Icing stage
Medium peak
Difficulty
Beginner
Teeth
0
Symmetry
24×
Cure
6 hours
Finished size
18 mm
Released
17 September 2026

By The Sugar Bench · Released 17 September 2026

Method

5 steps, pressure stated at each one

Hand position and bag pressure are stated for every step, because that is where most failures happen.

Swiss Dot Trail with Wilton 12 — Step 1: Plan the trail

Step 01 of 05

Plan the trail

Decide the number of beads from the height of the surface: nine beads over 130 mm, seven over 100 mm. Work out the starting size - 5 mm for a nine-bead trail - and the finishing size, which should be 2 mm.

HandMark the top and bottom bead positions with two tiny skewer dots before piping anything.
Bag pressureNone.
Swiss Dot Trail with Wilton 12 — Step 2: Pipe the largest bead

Step 02 of 05

Pipe the largest bead

Touch the 12 tip to the surface at the bottom mark and squeeze for one and a half seconds, holding the tip still, until the bead reaches 5 mm across. Stop completely, then lift straight up 15 mm.

HandTip vertical and touching; a tip held 3 mm above gives a flat disc instead of a bead.
Bag pressureMedium for one and a half seconds, then zero before the lift.
Swiss Dot Trail with Wilton 12 — Step 3: Step down through the trail

Step 03 of 05

Step down through the trail

Move up 8 mm and pipe the next bead for about 1.3 seconds, so it comes out 0.35 mm smaller. Continue upward, shortening each squeeze by a fraction of a second. The last bead is a 2 mm dot squeezed for half a second.

HandThe gap is judged by eye after the first three; if you use a ruler for every bead the trail looks mechanical.
Bag pressureMedium at the start of each bead, then hard off - the release is what makes a bead round.
Swiss Dot Trail with Wilton 12 — Step 4: Pipe the mirrored pink trail

Step 04 of 05

Pipe the mirrored pink trail

Move 25 mm to one side and pipe the same trail with the pink bag, but with one fewer bead and mirrored so the largest beads are at the bottom and the gradient runs the same way. Keep the bead sizes matched to the gold trail at each height.

HandAlign with the gold trail by sighting horizontally across the cake, not by measuring from the last pink bead.
Bag pressureMedium, identical to the gold trail - the only variable should be the bead count.
Swiss Dot Trail with Wilton 12 — Step 5: Repair and set

Step 05 of 05

Repair and set

Wipe any bead that is more than 0.5 mm off size with a fingertip within two minutes and re-pipe it. Leave the cake at 18 C for six hours before moving.

HandWipe in one direction with the flat of the fingertip, never scrub - scrubbing takes the skin off the surrounding surface.
Bag pressureNone.

Scroll sideways for each step →

Gradation, not uniformity

The whole effect comes from the change in size. Beads piped at a uniform 4 mm read as a string of pearls, which is a different decoration and a much more common one. Map your trail before you start: on a 130 mm tall cake side with nine beads, each bead is 0.35 mm smaller than the one below it. That is small enough to be invisible bead-to-bead and obvious across the whole trail.

Medium peak, hard release

Beads need medium-peak icing and a hard release - squeeze, stop completely, then lift straight up 15 mm. A slow lift leaves a small peak on top of the bead, which at 3 mm diameter is a quarter of the bead's height. If your beads are peaked, you are lifting before the pressure is fully off, not squeezing too hard.

Spacing and the 8 mm rule

Eight millimetres between bead centres looks tight at bench distance and correct at cake distance, which is where it matters. Spacing of 12 mm leaves gaps that read as unfinished; 5 mm and the beads merge into a caterpillar. Use the 12 round tip's own width as a rough gauge: bead, then a gap of one bead width, then the next bead.

Gold over ink, and a pink second trail

The card art pipes a gold trail and, 25 mm to its left, a pink trail that is one bead shorter and mirrored. Mirroring the two trails is what makes a plain side look deliberate. Colour 250 g for each, both medium peak, and keep the two bags at the same temperature - a warm pink bag next to a cold gold one will produce visibly different bead sizes.

Setting and repair

Six hours at 18 C, though beads crust in about ninety minutes. A mis-sized bead can be wiped off with a fingertip within two minutes and re-piped with no trace. After ten minutes the surface has skinned and wiping leaves a mark, so keep a damp cloth and a skewer nearby and fix as you go.

Failures and fixes

Symptom Cause Fix
Beads have a little peak on top The bag was lifted while still squeezing. Stop the pressure fully, count to one, then lift straight up 15 mm; the peak is a lifting error, not a pressure error.
Beads come out as flat discs The tip was held above the surface instead of touching it. Rest the coupler on the cake so the tip is in contact; a bead needs surface tension to pull into a sphere.
The trail looks like a string of pearls All beads piped at the same size. Apply the 0.35 mm step; write the squeeze times on a scrap of paper and follow them for the first trail.

Before you bag up

  • Nine beads over 130 mm, 8 mm apart
  • Largest bead 5 mm, smallest 2 mm
  • Tip touching the surface for every bead
  • Hard stop before each lift
  • Mis-sized beads wiped within two minutes

This card describes a method, not a formulation tested for allergens, shelf life or food safety; the ingredients, hygiene and safety of anything you give to someone else are your responsibility. Nothing here is sponsored and there is no affiliation with any tip or ingredient manufacturer. See the terms page for the full note.

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