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Budget
The Pasteleria Tokio near the intersection of Independencia and Rubio it's on Rubio offers exquisite pastries at a great price.
The Club Social at Cáceres 486 provides decent, full, seemingly home-cooked meals with soft drink and dessert for 2,000 pesos.
$$$
Top end
Reina Victoria on Paseo Independencia is a pricey but fine bakery, ice cream and coffee shop.