What’s the best kitchen utensil or appliance for mixing stiff doughs that contain numerous ingredients?

I’ve gotten into making from scratch a particular cheese straw recipe, but my current method is very time consuming. It involves first blending softened butter with grated cheese. Then, I have to blend in a large amount of sifted flour containing small amounts of other dry ingredients. I only have a regular hand mixer, and the dough quickly begins to build and bind up on it, causing the motor to overwork. I wind up mixing it as best I can, then taking several minutes to scrape the clinging dough off the mixer blades and mixing the dough more thoroughly with a spoon. There MUST be a better way, but I don’t know if I should invest in a better mixer, a food processor, or just get one of those inexpensive, wire dough blenders that are hand-held. The amount of finished dough I wind up with using this recipe is about two to three cups worth. Any advice from more experienced bakers?

I cann’t live without my kitchen aid mixer that’ll do the job. trust me it will be the last mixer you will buy so it is worth the investment. After i got it 8 years ago I don’t know why i never bought it in the first place because i must of went through15 hand mixers because i do allot of cookies. if you average 30 bucks a mixer times 13 years i could of got one sooner lol we live and learn

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Cuisinart Plastic Dough Blade $15 Plastic Dough Blade for the Cuisinart Elite Collection&Trade; 14-Cup Food Processor.