You can have a dessert party for pretty reasonable (at least for Disney standards) It depends on how big your guest list is.
Here is the break down of costs
Viewing fee $12.50 Although if you have your gusts enter through the regular Epcot entrance and meet you there you can save on this and the charter bus.
Venue fees Itoly Isola $575.00, French upper, lower and french arm is $275.00, Morroco $175.00, United Kingdom lower $200.00 upper $275.00
Menus
Supreme
Classic Tortes to include: Sacher, Dobos, Strawberry and Chambord
Stemware Glasses Filled with Classic Tiramisu, English Trifle, Fresh Fruit and Berries
Pastry Selections in Miniature to include: Almond Canoes, Cannolis, Eclairs, Gourmet Brownies and Cakes, Tiramisu, Chocolate Pecan Diamonds, Italian Amaretto Cream Cake and Fruit Tarts
Coffee, Decaffeinated Coffee, Hot Tea and Lemonade
$37.50 PP++
(1 Hour, 20 Person Minimum)
$42.50 PP++
(1½ Hours, 20 Person Minimum)
Deluxe
Stemware Glasses Filled with Classic Tiramisu, English Trifle, Fresh Fruit and Berries
Pastry Selections in Miniature to include: Almond Canoes, Cannolis, Eclairs, Gourmet Brownies and Cakes, Tiramisu, Chocolate Pecan Diamonds, Italian Amaretto Cream Cake and Fruit Tarts
Coffee, Decaffeinated Coffee, Hot Tea and Lemonade
$27.50 PP++
(1 Hour, 20 Person Minimum)
$32.50 PP++
(1½ Hours, 20 Person Minimum)
Build your own Desserts
Freshly Baked Shortcake, Vanilla Ice Cream, Seasonal Berries and Fresh Fruits
Fruit Sauces, Whipped Cream and White and Dark Chocolate Sauce
Chopped Nuts, Crushed Cookies, Colorful Sprinkles and Broken Candies
Coffee, Decaffeinated Coffee, Hot Tea and Lemonade
$25.00 PP++
(1 Hour, 50 Person Minimum)
$30.00 PP++
(1½ Hours, 20 Person Minimum)
Old World Classics in Miniature
Pastries in Miniature to include: Almond Canoes, Cannolis, Eclairs, Gourmet Brownies and Cakes, Tiramisu, Chocolate Pecan Diamonds,
Italian Amaretto Cream Cake and Fruit Tarts
Coffee, Decaffeinated Coffee, Hot Tea and Lemonade
$22.50 PP++
(1 Hour, 20 Person Minimum)
$27.50 PP++
(1½ Hours, 20 Person Minimum)
For the Child in You
Florida Lemon Bars, Double Chocolate Brownies
White Chocolate Chip with Macadamia Nut Cookies and Oatmeal Raisin Cookies
Chewy Rice Crispy Treats and Chocolate Marshmallow Squares
Coffee, Decaffeinated Coffee, Hot Tea and Lemonade
$17.50 PP++
(1 Hour, 20 Person Minimum)
$22.50 PP++
(1½ Hours, 20 Person Minimum)
It can be somewhat reasonable if you pick the cheapest menu and have guests meet you in the park.