Preheat the oven to 350°F (180°C).
In a bowl, cream together the butter and 1 cup of sugar for 2 minutes.
1 cup (222g) salted butter, softened , 1 1/4 cups (290g) granulated sugar, divided
Add in vanilla, egg and canola oil. Once combined, add the flour and baking powder to the bowl, mixing until the dough comes together.
3 tsp vanilla extract, 1 egg, 1/4 cup (60ml) canola oil , 3 cups (456g) all-purpose flour, 2 tsp baking powder
Divide the dough into 3 tbsp portions. Dip the bottom of a drinking cup into a bowl containing the remaining 1/4 cup of sugar and then flatten the cookie dough flat.
Bake for 9-11 minutes or until the centers are puffy and no longer glossy. Pull the cookies out of the oven before they turn brown. Allow the cookies to cool completely before continuing.
Make the icing by combining the salted butter, powdered sugar, vanilla and whipped topping together. Mix until smooth.
1/2 cup (111g) salted butter, softened , 3 cups (321g) powdered sugar, 2 tsp vanilla extract , 1 (8oz) tub whipped topping
Spread a generous amount of the icing onto each sugar cookie base and top with your choice of fruit.
diced fresh fruit, for topping