I had originally planned to follow the same method that I used for the Baslow Ranch single bed but decided to make the mattress with foam core board as I had done with the box springs.  I tried dressing the mattress I made for Baslow Ranch as a mockup for the guest room, but it didn't look right.  There needed to be more structure under the bed coverings, and foam core board provided that.  It also allowed me to use up some of the scraps I had laying around.

I cut three layers of foam core board slightly smaller than the box springs to allow for fabric coverings.

Using the thin batting I had used to stuff the Baslow Ranch bed, I covered the top and sides of the foam core board to give the mattress a softer appearance.

I pinned a scrap of white cotton sateen over the covered mattress and then sewed the corners to make a fitted sheet.

I turned it right side out, stretched it over the mattress and then glued the excess under the mattress.

Using the same fabric, I made a flat sheet, turning the edge under near the head of the bed.  I didn't sew the corners on this sheet.  Instead, I folded the corners and glued the excess under the mattress.

I made a blanket for the bed using two coordinating cotton prints that came in a set from Joann Fabrics.  I didn't use any batting since the double thickness seemed to have enough weight.  I pressed it into shape on the bed and dabbed a tiny bit of glue where needed to keep the blanket flat on the bed.

click image to enlarge

I made a pillow for the bed using the white sateen, filling it with seed beads.  I then sewed a pillowcase out of the same fabric and squeezed the stuffed pillow into it.  I like the way the pillow is bowed inside the crisp pillowcase; I think it adds a bit of realism.

My first dressed bed!  Hurray!