Mouat and women's team member Jen Dodds last week teamed up to win a doubles event in Gstaad before they lost in the Bern final to Lammie and Morrison.
Morrison and Dodds will look to draw on those performances and will be joined in Finland by Scottish mixed doubles champion Sophie Jackson, who reached the semi-finals along with Duncan McFadzean, and Sophie Sinclair.
Skip Morrison said "it is clear that we are all paying well".
"That gives us a lot of confidence," she said. "It just shows that, even when we are separated, we can still deliver and, when we come back together and rejoin as a team next week, hopefully we can do the same thing.
"We have been Scotland's representatives at the Europeans twice before and in our first year got a bronze and last year we finished fifth, and we weren’t very far away last season from meeting some goals that we had when we just missed qualifying for play-offs."
Morrison pointed out that the European Championships are doubly important as they are a qualifying event for this season’s World Championships, which in turn represents the last chance to pre-qualify Team GB for the Winter Olympics in 2026.
Fay Henderson, who skipped her team to victory at the Scottish Championships earlier this year, will be joining Team Scotland's women as their alternate.