Naomi Barrett, 53, went on a spending spree while working for Viscount Petersham at Crimonmogate, Aberdeenshire, between 2015 and 2016.
Barrett, of Branscombe, Devon, admitted the offence at Peterhead Sheriff Court.
She was ordered to carry out a community payback order with supervision and to repay the money.
Barrett had bought kitchen appliances and art works while having access to a company credit card as part of her role.
Sheriff Andrew Milligan told her: "You have pled guilty to this serious offence."

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10 January 2015 Last updated at 07:53 GMT
A farm in Dorset have got a trusty group of 25 goats that love to eat them.
The goats eat all of the greenery and leave just the bare branches.
The extra food is good for the animals and helps to keep them full up over the winter months.
Watch Hayley's report to find out more...

They agreed to take control of the two-time European Cup winners after reaching terms to buy the late Nigel Doughty's controlling stake.
"It's an honour and privilege to assume control of this great club," said the Kuwaiti-based family, who plan to hold a news conference on Saturday.
From 1865 to 1982, Nottingham Forest were run as a members club, and were the last Football League club to switch to becoming a limited company.
"You can be assured of our best efforts in bringing the Reds back to the top."
Doughty put Forest up for sale in October but died four months later.
The Al-Hasawi's interest in the club first emerged at the end of May.
Fawaz Al-Hasawi had been chairman of Al-Quadisya Sports Club in his native country, but his decision to step down was a precursor to interest in investment within English football.
"We know there are challenging times ahead of us to bring the club back to its glory days and we look forward with excitement towards a new successful future," added the Al-Hasawi statement.
"Over the next few weeks we will be working closely with our players, on-field and off-field team members in preparation for the forthcoming season."
Doughty, a genuine Forest supporter, helped rebuild the club financially, although recovering past glories has proved difficult.
The former European Cup winners were relegated to League One in 2005. They returned to the Championship after a three-year absence but, after two failed play-off campaigns, they finished 19th last season.

The incident happened on the A92 north of Inverbervie at 11:00 on Saturday.
The 23-year-old driver died at the scene. The 13-month-old girl suffered minor injuries and was airlifted to Aberdeen Royal Infirmary.
Police Scotland said no other vehicles were involved. The road was closed for several hours but has now re-opened.

30 November 2016 Last updated at 08:06 GMT
One that has been making news because it's been hard to get hold of is the new 'Hatchimal'.
It's a furry toy which hatches out of a plastic egg just like a real bird.
But is it any good? We asked some Newsrounders to review it. Check out the video to hear their verdict!
A viscount's former personal assistant who embezzled almost £23,000 has been ordered to repay the money or face going to jail.
[NEXT_CONCEPT]
Goats are being used as a handy new way to recycle unwanted Christmas trees.
[NEXT_CONCEPT]
The Al-Hasawi family have completed their takeover of Championship side Nottingham Forest.
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A woman has died after a car with a baby on board crashed and overturned in Aberdeenshire.
[NEXT_CONCEPT]
Every year Christmas comes around and with it a whole bunch of new toys.