Preheat oven to 350°F (175°C).

In a large bowl, beat softened butter, canola oil, sugar, and brown sugar until blended.

Beat in eggs, then vanilla extract.

In a separate bowl, combine all-purpose flour, cream of tartar, baking soda, and salt.

Gradually add the dry ingredients to the wet ingredients and mix well.

Stir in crisp rice cereal, quick-cooking oats, sweetened shredded coconut, chopped pecans, and milk chocolate English toffee bits.

Drop by tablespoonfuls 2 inches apart onto ungreased baking sheets.

Bake at 350°F (175°C) for 10-12 minutes or until lightly browned.

Remove to wire racks to cool completely.